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Title: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on October 14, 2013, 07:11:50 AM Guys, I have done this on Sapphire 7970 and Gigabyte 7950s. I had undervolted the ROMs to have them running at lover voltages.
Before specs:
To modify your BIOS, follow the instructions listed below. See Disclaimer below.
After doing all this above, you will save money and be able to run a cooler rig. I now use 1250 watts total and it a beautiful space heater for my whole house :) Happy Bios Flashing, Video Card Undervolting & Coin Mining! If you Found this article useful, please send a donation to: BTC: 1PoN7e4q5DMoTXiU2HYecbaGrb78mSxo6W LTC: LNYFzi4ed8gBwk8joVpntk5apUcvndu2g9 BTB: BBe9NyL2uzne4ZEXax39huFzUH1XMD4a7t BTG: gbpuqkpmZVhcJgZBQtmGRamSvLdEhQFEkM DISCLAIMER: Any and all modifications done here is at your own risk. I am not responsible if your hardware goes dead, gets damaged, or burns up. This information is strictly for educational purpose. Use at your own risk. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: ssateneth on October 14, 2013, 03:17:57 PM The benefit of doing this is what exactly? I'm going to assume you have free power. The point of this is to reduce power consumption, so lower electric bills. It's also possible the resulting lower temperatures gives higher overclock headroom, even at lower volts. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: kuusj98 on October 14, 2013, 05:42:41 PM Funny thing is, is that my HD7850's don't really use more power when overvolted, or use less when undervolted.
But, 100W is a huge win, such things mean ROI or no ROI. Thanks for the guide, I thing many people will find this usefull. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: ssateneth on October 14, 2013, 05:57:04 PM Funny thing is, is that my HD7850's don't really use more power when overvolted, or use less when undervolted. But, 100W is a huge win, such things mean ROI or no ROI. Thanks for the guide, I thing many people will find this usefull. Maybe your 7850 is voltage locked. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: Wipeout2097 on October 14, 2013, 07:13:41 PM That's an excellent post! I've done it 2 weeks ago, but using an usb pen booting DOS.
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: l3jmr on October 14, 2013, 08:58:53 PM Funny thing is, is that my HD7850's don't really use more power when overvolted, or use less when undervolted. Think most of 7850's are voltage locked. I have voltage slider on my asus/xfx cards and i can move it around. But if i check in gpu-z it's at the same stock value no matter what i do.But, 100W is a huge win, such things mean ROI or no ROI. Thanks for the guide, I thing many people will find this usefull. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on October 15, 2013, 02:33:10 AM This is for Hardware that has Voltage locked via the BIOS. All you are doing is Lowering the Voltage Lock ceiling down to a lower level. This way, it is still voltage locked but at a lower level. therefore unlocking it per say.
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 15, 2013, 05:03:53 AM Thanks for writing this guide, but be aware that this doesn't actually change the voltage. It just changes what ADL *reports* as the voltage. The voltage must be changed by modifying the values sent to the voltage regulator. The number you're modifying is only a "label" for the voltage used, not to control the voltage itself. You'll see the voltage change in CGMiner etc, but if you measure it with a meter, it didn't move.
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 15, 2013, 05:50:41 AM Further explanation:
For every 7000 series card, there are five voltages in a table for the "performance" state. You'll notice that each 7000 series card you buy doesn't necessarily have the same voltage, but the BIOS is identical. The voltage that gets used depends on the quality of the ASIC on the board. If your chip has extremely low leakage, the lowest value (of the five voltages) gets used. Highest leakage = highest value. Somewhere in the middle = one of the other three values. There is a function in GPU-Z that will read the "ASIC Quality" value of your card if you're curious. It's even more complicated for boost BIOSes. There's *another* table of 5 values for the "boost" state. The card will switch back and forth depending on the thermal state. On the 7990 cards, there's a THIRD leakage table (beyond the scope of what I'm writing). If you want to change the voltage on a 7000 series card, you have to modify the extended voltage tables (referred to as LEAKID_VOLTAGE or VOLTAGE_LUT_ENTRY). You either need to modify all 5 of the values to be identical (which is wasteful if you flash it to a bunch of cards with different leakage), or you need to modify the values proportionally to be higher/lower. If it's a boost edition card, you'll need to modify the 2nd table as well. For the 7990 cards, you'll need to modify the 3rd state table as well (assuming you're keeping the card extremely cool anyways... otherwise the voltage will likely bounce around). The cards that are "voltage locked" actually aren't technically "locked". They still have a variable VRM and can be modified. The BIOS just has a function that loops and repeatedly sets the voltage. When you change the voltage with a utility like MSI Afterburner, the voltage actually changes for a split second but it gets changed back by the card's BIOS. You can still set the voltage in the leakage tables though. The only utility I'm aware of that will properly modify these tables is here: http://www.techpowerup.com/forums/showthread.php?t=189089 This utility will modify all 5 voltage values to be the same though. If you use this to modify your BIOS and then flash it to multiple cards, you're most likely wasting electricity because you'll set the voltage high on a low-leakage chip. Either that, or you'll flash too low of a voltage on a high leakage chip and it'll be unstable at your desired clock. In other words -- you'll need to create multiple BIOS files with different voltages and flash them according to your cards for optimal power savings (or modify the files manually with proper voltage "steps"). I spent many full days reverse engineering the 7000 series BIOSes quite a few months back. If anyone has any technical questions, feel free to post 'em. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: philips on October 15, 2013, 10:21:10 AM Further explanation: For every 7000 series card, there are five voltages in a table for the "performance" state. You'll notice that each 7000 series card you buy doesn't necessarily have the same voltage, but the BIOS is identical. The voltage that gets used depends on the quality of the ASIC on the board. If your chip has extremely low leakage, the lowest value (of the five voltages) gets used. Highest leakage = highest value. Somewhere in the middle = one of the other three values. There is a function in GPU-Z that will read the "ASIC Quality" value of your card if you're curious. It's even more complicated for boost BIOSes. There's *another* table of 5 values for the "boost" state. The card will switch back and forth depending on the thermal state. On the 7990 cards, there's a THIRD leakage table (beyond the scope of what I'm writing). If you want to change the voltage on a 7000 series card, you have to modify the extended voltage tables (referred to as LEAKID_VOLTAGE or VOLTAGE_LUT_ENTRY). You either need to modify all 5 of the values to be identical (which is wasteful if you flash it to a bunch of cards with different leakage), or you need to modify the values proportionally to be higher/lower. If it's a boost edition card, you'll need to modify the 2nd table as well. For the 7990 cards, you'll need to modify the 3rd state table as well (assuming you're keeping the card extremely cool anyways... otherwise the voltage will likely bounce around). The cards that are "voltage locked" actually aren't technically "locked". They still have a variable VRM and can be modified. The BIOS just has a function that loops and repeatedly sets the voltage. When you change the voltage with a utility like MSI Afterburner, the voltage actually changes for a split second but it gets changed back by the card's BIOS. You can still set the voltage in the leakage tables though. The only utility I'm aware of that will properly modify these tables is here: http://www.techpowerup.com/forums/showthread.php?t=189089 This utility will modify all 5 voltage values to be the same though. If you use this to modify your BIOS and then flash it to multiple cards, you're most likely wasting electricity because you'll set the voltage high on a low-leakage chip. Either that, or you'll flash too low of a voltage on a high leakage chip and it'll be unstable at your desired clock. In other words -- you'll need to create multiple BIOS files with different voltages and flash them according to your cards for optimal power savings (or modify the files manually with proper voltage "steps"). I spent many full days reverse engineering the 7000 series BIOSes quite a few months back. If anyone has any technical questions, feel free to post 'em. Thanks for all this info. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: hulk on October 16, 2013, 02:54:17 PM It would be easier to buy GPU that is voltage unlocked, its has more flexibility and save time.
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 16, 2013, 03:58:44 PM It would be easier to buy GPU that is voltage unlocked, its has more flexibility and save time. Not even close (unless you only run one rig with a few cards). My world would be a nightmare if I couldn't flash my cards and run Linux.Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 16, 2013, 04:00:20 PM and if there's an interest to fund such a thing, I'm confident that I could reverse engineer and modify locked card BIOSes to be unlocked. My time is just spread very thin right now.
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: hulk on October 16, 2013, 04:02:39 PM It would be easier to buy GPU that is voltage unlocked, its has more flexibility and save time. Not even close (unless you only run one rig with a few cards). My world would be a nightmare if I couldn't flash my cards and run Linux.What do you mean, have you tried runing 6 GPU on window 7? Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 16, 2013, 04:45:18 PM It would be easier to buy GPU that is voltage unlocked, its has more flexibility and save time. Not even close (unless you only run one rig with a few cards). My world would be a nightmare if I couldn't flash my cards and run Linux.What do you mean, have you tried runing 6 GPU on window 7? Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: hulk on October 17, 2013, 01:09:10 AM It would be easier to buy GPU that is voltage unlocked, its has more flexibility and save time. Not even close (unless you only run one rig with a few cards). My world would be a nightmare if I couldn't flash my cards and run Linux.What do you mean, have you tried runing 6 GPU on window 7? Wow, that is a lot of GPU. I am thinking to upgrade my 4 GPU window 7 to 6 GPU but some people told me that its unstable and others tell me it should work. Any idea since I believe you used window prior to linux? Thanks in advance. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: jdebunt on October 17, 2013, 06:53:30 PM very nice info, i have a sapphire 7970 & may use this :)
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: xminer on October 17, 2013, 08:08:07 PM Funny thing is, is that my HD7850's don't really use more power when overvolted, or use less when undervolted. But, 100W is a huge win, such things mean ROI or no ROI. Thanks for the guide, I thing many people will find this usefull. Definitely voltage is locked. With all of my 5870/5770/5750/7850/7950 I can see the difference in wattage;it is even possible to run 7950 close to 100W at 0.8V/600-800MHz core. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: xminer on October 17, 2013, 08:21:06 PM Guys, I have done this on Sapphire 7970 and Gigabyte 7950s. I had undervolted the ROMs to have them running at lover voltages. Before specs:
The idea of undervolting is pretty useful but 2 moments: 1. amm, you didn't state frequencies used before and after - really, only changing voltages affected hash rate?! ("I don't believe you!") 2. There are memory timings - and it does help if you can edit them. But I don't know how to do that. E.g. 7850 from sapphire and 7850 from gigabyte can reach 375-400kh and up to 350kh "whatever you do" respectively; all with the same settings(like 1100/1250). HIS 7950 ICEQ does 585kh/s at 970/1000 and nothing more - whatever I try; raising mem speed to 1250 or whatever upper - doesn't do any good. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on October 18, 2013, 03:36:43 AM Guys, I have done this on Sapphire 7970 and Gigabyte 7950s. I had undervolted the ROMs to have them running at lover voltages. Before specs:
The idea of undervolting is pretty useful but 2 moments: 1. amm, you didn't state frequencies used before and after - really, only changing voltages affected hash rate?! ("I don't believe you!") 2. There are memory timings - and it does help if you can edit them. But I don't know how to do that. E.g. 7850 from sapphire and 7850 from gigabyte can reach 375-400kh and up to 350kh "whatever you do" respectively; all with the same settings(like 1100/1250). HIS 7950 ICEQ does 585kh/s at 970/1000 and nothing more - whatever I try; raising mem speed to 1250 or whatever upper - doesn't do any good. 1: Both at Intensity 20, Thread Concurrency @ 40960, Shaders @ 1792, lookup gap @ 2, Threads @ 1, powertune @ 0 Before undervolting, running 1090MHz CPU, 1500 MHz Memory After undervolting, running 1080MHz CPU, 1250 MHz Memory. 250MHz lower on memory speed yet gained 115kh/s 2: Nor do I but it does not affect mem timing if you are using the memory stock speed of your vid card. Gigabyte and Sapphires work great for getting good high hash rates. I had an XFX, was crap returned it. Consider maxing out the Thread Concurrency as much as possible along with the shaders. It worked for me and getting great speeds. Scrypt is memory intensive so more memory it gets the more it can hash. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: cowandtea on October 18, 2013, 07:38:14 AM Guys, I have done this on Sapphire 7970 and Gigabyte 7950s. I had undervolted the ROMs to have them running at lover voltages. Before specs:
The idea of undervolting is pretty useful but 2 moments: 1. amm, you didn't state frequencies used before and after - really, only changing voltages affected hash rate?! ("I don't believe you!") 2. There are memory timings - and it does help if you can edit them. But I don't know how to do that. E.g. 7850 from sapphire and 7850 from gigabyte can reach 375-400kh and up to 350kh "whatever you do" respectively; all with the same settings(like 1100/1250). HIS 7950 ICEQ does 585kh/s at 970/1000 and nothing more - whatever I try; raising mem speed to 1250 or whatever upper - doesn't do any good. 1: Both at Intensity 20, Thread Concurrency @ 40960, Shaders @ 1792, lookup gap @ 2, Threads @ 1, powertune @ 0 Before undervolting, running 1090MHz CPU, 1500 MHz Memory After undervolting, running 1080MHz CPU, 1250 MHz Memory. 250MHz lower on memory speed yet gained 115kh/s 2: Nor do I but it does not affect mem timing if you are using the memory stock speed of your vid card. Gigabyte and Sapphires work great for getting good high hash rates. I had an XFX, was crap returned it. Consider maxing out the Thread Concurrency as much as possible along with the shaders. It worked for me and getting great speeds. Scrypt is memory intensive so more memory it gets the more it can hash. That is weird, undervolting normally only result in equal hash rate or lower. Maybe its due to powertune @ 0. hm... Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: Samir_H on October 18, 2013, 10:16:00 AM @swiftshoot thanks for post and what are temperatures before and after?
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: kuusj98 on October 18, 2013, 03:17:34 PM Funny thing is, is that my HD7850's don't really use more power when overvolted, or use less when undervolted. Think most of 7850's are voltage locked. I have voltage slider on my asus/xfx cards and i can move it around. But if i check in gpu-z it's at the same stock value no matter what i do.But, 100W is a huge win, such things mean ROI or no ROI. Thanks for the guide, I thing many people will find this usefull. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: carly200 on October 21, 2013, 07:42:00 PM can anybody verify those results?
I still wonder how the hashrate would go up through undervolting.... Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 21, 2013, 07:45:04 PM can anybody verify those results? Read my post in this thread. This does not alter the voltage. There is a utility that will allow you to change it though.I still wonder how the hashrate would go up through undervolting.... Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: carly200 on October 21, 2013, 11:48:08 PM i read your post, still both don't make sense.
so what is it, that is stated in the first post? Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on October 23, 2013, 12:22:06 AM @swiftshoot thanks for post and what are temperatures before and after? Before I was at 79-85c depending on the board...After I was as low as 62-65c but now I tuned it to 72-74c so that I can heat my house... we getting cold nights here so having the GPUs heat helps us save on the Heating bills. Funny thing is, is that my HD7850's don't really use more power when overvolted, or use less when undervolted. Think most of 7850's are voltage locked. I have voltage slider on my asus/xfx cards and i can move it around. But if i check in gpu-z it's at the same stock value no matter what i do.But, 100W is a huge win, such things mean ROI or no ROI. Thanks for the guide, I thing many people will find this usefull. can anybody verify those results? I would think it is all a matter of timing between memory and gpus... since they are not overclocked to push more and produce lots of heat they work in unison. I was shocked too when I saw the results. If I tried to overclock while undervolted, it would then drop in performance. I think the bell curve gets shifted downwards as you undervolt.I still wonder how the hashrate would go up through undervolting.... Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 23, 2013, 12:56:25 AM I would think it is all a matter of timing between memory and gpus... since they are not overclocked to push more and produce lots of heat they work in unison. I was shocked too when I saw the results. If I tried to overclock while undervolted, it would then drop in performance. I think the bell curve gets shifted downwards as you undervolt. Go measure your card's voltage with a meter before and after what you're changing in the BIOS. It isn't budging, I assure you. Your power consumption changes are either differences in settings, or you're measuring when cards are hot vs cold.Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on October 23, 2013, 01:42:37 AM 1: Both at Intensity 20, Thread Concurrency @ 40960, Shaders @ 1792, lookup gap @ 2, Threads @ 1, powertune @ 0 Before undervolting, running 1090MHz CPU, 1500 MHz Memory After undervolting, running 1080MHz CPU, 1250 MHz Memory. 250MHz lower on memory speed yet gained 115kh/s 2: Nor do I but it does not affect mem timing if you are using the memory stock speed of your vid card. Gigabyte and Sapphires work great for getting good high hash rates. I had an XFX, was crap returned it. Consider maxing out the Thread Concurrency as much as possible along with the shaders. It worked for me and getting great speeds. Scrypt is memory intensive so more memory it gets the more it can hash. That is weird, undervolting normally only result in equal hash rate or lower. Maybe its due to powertune @ 0. hm... { "intensity" : "20", "vectors" : "1", "worksize" : "256", "kernel" : "scrypt", "lookup-gap" : "2", "thread-concurrency" : "40960", "shaders" : "1792,1792,2048,1792,1792", "expiry" : "2", "gpu-dyninterval" : "7", "gpu-platform" : "0", "gpu-threads" : "1", "gpu-engine" : "1100,1080,1100,1080,1060", "gpu-memclock" : "1250,1250,1500,1250,1250", "gpu-vddc" : "1.020,1.01,0.962,1.003,1.08", "gpu-powertune" : "0", "auto-fan" : true, "temp-target" : "75", "temp-overheat" : "79", "temp-cutoff" : "83", "log" : "5", "failover-only" : true, "no-pool-disable" : true, "queue" : "2", "scan-time" : "1", "scrypt" : true, "shares" : "0", "kernel-path" : "/usr/local/bin" } And CGMiner results. cgminer version 3.1.0 - Started: [2013-10-18 22:46:23] -------------------------------------------------------------------------------- (5s):3.350M (avg):3.329Mh/s | A:53296 R:5269 HW:0 U:9.5/m WU:3099.7/m ST: 3 SS: 265 NB: 15036 LW: 649635 GF: 190 RF: 52 Connected to stratum01.hashco.ws diff 237 with stratum as user swiftshoot.2 Block: cdc821b513950ac7... Diff:539K Started: [20:29:55] Best share: 10.2M -------------------------------------------------------------------------------- [P]ool management [G]PU management \[S\]ettings [D]isplay options [Q]uit GPU 0: 72.0C 3236RPM | 667.1K/663.4Kh/s | A:10578 R:1033 HW:0 U:1.88/m I:20 GPU 1: 73.0C 2199RPM | 656.7K/651.2Kh/s | A:10458 R:1026 HW:0 U:1.86/m I:20 GPU 2: 72.0C 2841RPM | 728.5K/723.1Kh/s | A:11713 R:1064 HW:0 U:2.08/m I:20 GPU 3: 72.0C 1883RPM | 653.6K/651.4Kh/s | A:10451 R:1050 HW:0 U:1.86/m I:20 GPU 4: 73.0C 4638RPM | 645.2K/640.2Kh/s | A:10096 R:1096 HW:0 U:1.80/m I:20 -------------------------------------------------------------------------------- GPU 0: 667.7 / 663.4 Kh/s | A:10578 R:1033 HW:0 U:1.88/m I:20 72.0 C F: 78% (3244 RPM) E: 1100 MHz M: 1250 Mhz V: 1.019V A: 99% P: 0% Last initialised: [2013-10-18 22:46:23] Intensity: 20 Thread 0: 668.4 Kh/s Enabled ALIVE GPU 1: 655.0 / 651.2 Kh/s | A:10456 R:1026 HW:0 U:1.86/m I:20 73.0 C F: 52% (2199 RPM) E: 1080 MHz M: 1250 Mhz V: 1.009V A: 99% P: 0% Last initialised: [2013-10-18 22:46:23] Intensity: 20 Thread 1: 655.2 Kh/s Enabled ALIVE GPU 2: 726.9 / 723.1 Kh/s | A:11712 R:1064 HW:0 U:2.08/m I:20 72.0 C F: 79% (2781 RPM) E: 1100 MHz M: 1500 Mhz V: 0.962V A: 99% P: 0% Last initialised: [2013-10-18 22:46:23] Intensity: 20 Thread 2: 726.1 Kh/s Enabled ALIVE GPU 3: 654.8 / 651.4 Kh/s | A:10450 R:1050 HW:0 U:1.86/m I:20 72.0 C F: 45% (1881 RPM) E: 1080 MHz M: 1250 Mhz V: 1.003V A: 99% P: 0% Last initialised: [2013-10-18 22:46:23] Intensity: 20 Thread 3: 653.9 Kh/s Enabled ALIVE GPU 4: 645.5 / 640.2 Kh/s | A:10095 R:1096 HW:0 U:1.80/m I:20 73.0 C F: 29% (2229 RPM) E: 1060 MHz M: 1250 Mhz V: 1.080V A: 99% P: 0% Last initialised: [2013-10-18 22:46:23] Intensity: 20 Thread 4: 645.1 Kh/s Enabled ALIVE [E]nable [D]isable ntensity [R]estart GPU [C]hange settings Or press any other key to continue Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on October 23, 2013, 01:49:13 AM I would think it is all a matter of timing between memory and gpus... since they are not overclocked to push more and produce lots of heat they work in unison. I was shocked too when I saw the results. If I tried to overclock while undervolted, it would then drop in performance. I think the bell curve gets shifted downwards as you undervolt. Go measure your card's voltage with a meter before and after what you're changing in the BIOS. It isn't budging, I assure you. Your power consumption changes are either differences in settings, or you're measuring when cards are hot vs cold.GPUs are not Car engines... running hot or cold makes nominal difference. Here is my Before Undervolting settings. "intensity" : "20", "vectors" : "1", "worksize" : "256", "kernel" : "scrypt", "lookup-gap" : "2", "thread-concurrency" : "40960", "shaders" : "1792,1792,2048,1792,1792", "api-port" : "4028", "api-listen" : true, "expiry" : "10", "gpu-dyninterval" : "7", "gpu-platform" : "0", "gpu-threads" : "1", "gpu-engine" : "900,900,1080,900,900", "gpu-memclock" : "1250,1250,1680,1250,1250", "gpu-vddc" : "1.030,1.125,1.175,1.125,1.125", "gpu-powertune" : "0", "auto-fan" : true, "temp-target" : "70", "temp-overheat" : "77", "temp-cutoff" : "83", "log" : "5", "no-pool-disable" : true, "queue" : "10", "scan-time" : "1", "scrypt" : true, "shares" : "0", "rotate" : "1440", "kernel-path" : "/usr/local/bin" } Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: EfterlysT on October 23, 2013, 11:49:26 AM Anyone that have a successful undervolted 7950 bios file to share ?
It would be much appreciated ! Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 24, 2013, 12:54:20 AM GPUs are not Car engines... running hot or cold makes nominal difference. You are quite wrong. Power consumption rises as temperatures within the ASIC increase (leakage increases because resistance increases). AMD's 28nm chips are extremely sensitive to this, and the power consumption climbs rapidly above about 73-74c. Go put 4 7970s in a rig, measure it at 60-65c and then measure it at 80c. You'll see 80-100 extra watts being drawn from the wall, even though the fans spun DOWN. Water cool the chips and you'll notice a pretty significant decrease in power consumption under load. Lastly, you'll notice that power consumption is *much* lower when you first start your mining software. Go measure it again after 15 minutes and be amazed by how much more power is being drawn after the ASIC heated up.Once again, the number you are altering doesn't change the power consumption on ANY 7000 series BIOS. I don't mean to sound pompous here and I'm only trying to educate, but I know what that value does and you clearly do not. If you had spent enough time reverse-engineering that value, you'd realize that it only changes the voltage reported by ADL (and it changes the voltage on cards prior to Southern Island chips since they had a function that translated the voltage value into the proper commands to send to the voltage regulator. The 7000 series cards do not have this.) Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 24, 2013, 01:05:14 AM http://images.hardwarecanucks.com/image//skymtl/GPU/GTX-580/GTX-580-92.jpg
Here's an example with a GTX 480 and GTX 580. There may be one out there for a Southern Islands chip, but I haven't dug around. From experience though, I know that the 28nm chips have very high leakage at higher temps, and you don't have to get them as hot as the previous generation before you start seeing leakage ramp up significantly. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: johncarpe64 on October 24, 2013, 02:12:08 AM http://images.hardwarecanucks.com/image//skymtl/GPU/GTX-580/GTX-580-92.jpg Here's an example with a GTX 480 and GTX 580. There may be one out there for a Southern Islands chip, but I haven't dug around. From experience though, I know that the 28nm chips have very high leakage at higher temps, and you don't have to get them as hot as the previous generation before you start seeing leakage ramp up significantly. Do you have one with ATI? Not a fan of nvidia, sorry :) Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 24, 2013, 02:15:03 AM Did you even read the post that you quoted? :) I didn't make that chart, and no CPU/GPU is immune to the laws of thermodynamics -- regardless of brand. ;)
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on October 26, 2013, 11:55:09 AM Anyone that have a successful undervolted 7950 bios file to share ? It would be much appreciated ! If you want me to undervolt your BIOS, send me a link to it via PM... Donations welcome. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on October 26, 2013, 11:59:27 AM GPUs are not Car engines... running hot or cold makes nominal difference. You are quite wrong. Power consumption rises as temperatures within the ASIC increase (leakage increases because resistance increases). AMD's 28nm chips are extremely sensitive to this, and the power consumption climbs rapidly above about 73-74c. Go put 4 7970s in a rig, measure it at 60-65c and then measure it at 80c. You'll see 80-100 extra watts being drawn from the wall, even though the fans spun DOWN. Water cool the chips and you'll notice a pretty significant decrease in power consumption under load. Lastly, you'll notice that power consumption is *much* lower when you first start your mining software. Go measure it again after 15 minutes and be amazed by how much more power is being drawn after the ASIC heated up.Once again, the number you are altering doesn't change the power consumption on ANY 7000 series BIOS. I don't mean to sound pompous here and I'm only trying to educate, but I know what that value does and you clearly do not. If you had spent enough time reverse-engineering that value, you'd realize that it only changes the voltage reported by ADL (and it changes the voltage on cards prior to Southern Island chips since they had a function that translated the voltage value into the proper commands to send to the voltage regulator. The 7000 series cards do not have this.) Still drawing 1250 Watts and getting 3.329 Mh/sec. I have been running overnight. I will set the temp lower to see if that will reduce consumption. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swordfish6975 on October 26, 2013, 04:06:00 PM So you guys are doing what I posted here (https://bitcointalk.org/index.php?topic=207898.msg2177193#msg2177193)?
The warning is probably a bit stern on that page, these cards have a small dual bios switch (http://www.bjorn3d.com/Material/revimages/video/amdhd6990/bios.jpg), I have dumped the read only bios and flashed it across to user area before. some premade ones for MODEL: AX7950 3GBD5-2DHV5E (http://www.powercolor.com/Global/products_features.asp?id=455#Specification) in that thread above some tips to make the process easier. gpu-z has a button to dump your bios in windows. then hex edit. then use aitflash to load it in to the card with -f (force bios flash) Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 26, 2013, 05:51:52 PM You guys are delusional. Here, let me prove my point. Here's a 7950 that I modified to run on FIVE volts. You understand that this card should be melting down, right?:
https://i.imgur.com/ST9ARgy.png https://i.imgur.com/OpTRgrG.png Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 26, 2013, 05:54:13 PM P.S. This rig takes 673 watts (at the wall) to run because I *actually* undervolted it.
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: philips on October 26, 2013, 06:44:35 PM You guys are delusional. Here, let me prove my point. Here's a 7950 that I modified to run on FIVE volts. You understand that this card should be melting down, right?: https://i.imgur.com/OpTRgrG.png Good one ;D Have you by chance experimented with this utility? http://www.techpowerup.com/forums/showthread.php?t=183423 Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 26, 2013, 08:24:27 PM Good one ;D Yeah, you quoted my reply about that utility on page 1 of this thread. ;DHave you by chance experimented with this utility? http://www.techpowerup.com/forums/showthread.php?t=183423 Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: philips on October 26, 2013, 08:33:25 PM No, the one I quoted few days ago is made by Darkhmz.
This one is made by Dragonheart. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 26, 2013, 08:43:58 PM Oh, whoops. :D That's what happens when I browse on my phone. The screenshots were small and I just glanced past it. I'll check it out! Thanks for the link!
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on October 28, 2013, 11:56:36 PM P.S. This rig takes 673 watts (at the wall) to run because I *actually* undervolted it. You are running 900 mhz gpu and 800 mhz memory.. no wonder you are at 673 watts at wall... set it to 1060-1100 mhz gpu and 1250 memory then report back with your watts at wall... Lets measure apples with apples now. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on October 30, 2013, 08:09:40 AM You want me to overclock instead of undervolt? Now you're really confusing. I'll never hit 1060-1100 mhz on those chips with my lowered voltage, and I intended it to be that way.
My voltage/clocks -- 3.27MH/J Your clocks -- 2.955MH/J Once again, you have no idea what you're editing. I've tried to help, but you're still so sure of yourself (even though you've obviously not disassembled the code to that BIOS). I've made national news for things I've done with video cards, but I'm sure you're still right. ::) Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: swiftshoot on November 03, 2013, 04:18:14 AM You want me to overclock instead of undervolt? Now you're really confusing. I'll never hit 1060-1100 mhz on those chips with my lowered voltage, and I intended it to be that way. My voltage/clocks -- 3.27MH/J Your clocks -- 2.955MH/J Once again, you have no idea what you're editing. I've tried to help, but you're still so sure of yourself (even though you've obviously not disassembled the code to that BIOS). I've made national news for things I've done with video cards, but I'm sure you're still right. ::) Youppi! You made National News... unfortunately it was not World News. I am sacrificing 0.315 MH/J to be able to heat my house better. For some people, we need our HEAT to keep our house warm. What better way to heat our house than with Mining? HEAT and make money with it. Before I undervolted (or you thinking I am not undervolting), at stock BIOS with the speeds I am currently running undervolted, I hit 1700 Watts @ 2.9 GH/s (Digital PS handled it for a short time). Now I am doing 1250 Watts @ 3.329GH/s... So shaving off 450 Watts is not undervolting then what is? Yep, it looks like I have no idea what I am editing oh mighty BIOS god however, it looks like I found something YOU did not find... gaining Hash Power with lower power consumption. If you want to discredit this finding by all means please do. I am just happy I am able to run the 5 cards at the speeds I am getting. I do however credit your findings... you spent more time than I did disassembling the BIOS... Surprised you did not find the secret to gain more hashing power out of it like I did. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: Spoetnik on November 18, 2013, 02:12:20 AM its painfully obvious this guy knows his shit..
and it was a pleasure to see someone who knows how i feel.. i've been through this too many times in the altcoin scene lol i'm an old cracker and a coder and i have a large resume too and little shits get mad about it and say your bragging and of course argue every chance they get.. failing to get the damn point. sveetsnelda screw em.. you know your right and you tried to help what more can you do ? let the ignorant drown.. nothing against swiftwshoot but recognize.. this guy knows his shit trust me lol that bugs you all out there ? too damn bad suck it up. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: sveetsnelda on November 18, 2013, 07:49:20 PM Cheers, Spoetnik. :)
Yeah, the point wasn't to brag. It was to state that I had experience and a "resume" to back it up. All I did was try to educate how to *actually* change the I2C values for the voltage. Also, it was world news. Ask nVidia's PR department. ;) http://www.brightsideofnews.com/news/2009/9/24/nvidia-sli-cracked---works-on-all-motherboards-now-.aspx National vs world news doesn't change anything though. The code still works the same way. If you can't swallow your pride and admit ignorance, you're going to have a tough time learning. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: mar69theone on December 07, 2013, 11:32:27 PM Guys, I have done this on Sapphire 7970 and Gigabyte 7950s. I had undervolted the ROMs to have them running at lover voltages. Before specs:
To modify your BIOS, follow the instructions listed below. See Disclaimer below.
After doing all this above, you will save money and be able to run a cooler rig. I now use 1250 watts total and it a beautiful space heater for my whole house :) Happy Bios Flashing, Video Card Undervolting & Coin Mining! If you Found this article useful, please send a donation to: BTC: 1PoN7e4q5DMoTXiU2HYecbaGrb78mSxo6W LTC: LNYFzi4ed8gBwk8joVpntk5apUcvndu2g9 BTB: BBe9NyL2uzne4ZEXax39huFzUH1XMD4a7t BTG: gbpuqkpmZVhcJgZBQtmGRamSvLdEhQFEkM DISCLAIMER: Any and all modifications done here is at your own risk. I am not responsible if your hardware goes dead, gets damaged, or burns up. This information is strictly for educational purpose. Use at your own risk. It unlocked my XFX Double D FX-797A-TD FX with dual DVI so i am able to regulate the voltage in trixx now. I just replaced the value in two places in the bios. Thanks a lot Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: franciz on December 14, 2013, 04:51:54 PM @mar69theone
What did you do to unlock the voltage? which was the default voltage and what did you change it for?? Did you have to change more data to get the correct checksum??? I have a locked XFX 7950 and want to undervolt it, but I am afraid to do it becouse this card doesn't have the backup switch... Thanks!! Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: franciz on December 15, 2013, 08:41:14 AM I took the risk and flash the card with a 1084v bios, the original was 1250v.
The temperature only came down by 5º. It was at 84º and now it is at 79º. Atiwinflash backed up a 256 kb rom, this one do not work. Use the gpu-z backup that is 128kb. The undervolt worked fine, but apparently this card is really hot either way. EDIT: Still testing, at 1000mv, temperature is at 78º but fan velocity went down from 4000 to 3600 rpm. I read that at low voltage the 7950 cards went down to 65 or 70º. But this XFX must be really bad quality because it is still really hot. EDIT2: I flashed a 975mv bios and when I opened cgminer, it never started mining. Then I bricked the card, fixed it using an Nvidia as primary, and went back to 1000mv. I had never flashed an ati card before. It seems ati cards are really good when it comes to flashing bios, you can fix a bricked card really easy. TIP: If you use atiwinflash and it says bios upload failed, NEVER reboot the pc. Just wait a minutes and try again until the bios uploads succesfully. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: mar69theone on January 19, 2014, 01:57:26 PM @mar69theone What did you do to unlock the voltage? which was the default voltage and what did you change it for?? Did you have to change more data to get the correct checksum??? I have a locked XFX 7950 and want to undervolt it, but I am afraid to do it becouse this card doesn't have the backup switch... Thanks!! franciz, Check this tread https://bitcointalk.org/index.php?topic=361648.msg3871104#msg3871104 Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: mar69theone on January 19, 2014, 02:03:39 PM I took the risk and flash the card with a 1084v bios, the original was 1250v. The temperature only came down by 5º. It was at 84º and now it is at 79º. Atiwinflash backed up a 256 kb rom, this one do not work. Use the gpu-z backup that is 128kb. The undervolt worked fine, but apparently this card is really hot either way. EDIT: Still testing, at 1000mv, temperature is at 78º but fan velocity went down from 4000 to 3600 rpm. I read that at low voltage the 7950 cards went down to 65 or 70º. But this XFX must be really bad quality because it is still really hot. EDIT2: I flashed a 975mv bios and when I opened cgminer, it never started mining. Then I bricked the card, fixed it using an Nvidia as primary, and went back to 1000mv. I had never flashed an ati card before. It seems ati cards are really good when it comes to flashing bios, you can fix a bricked card really easy. TIP: If you use atiwinflash and it says bios upload failed, NEVER reboot the pc. Just wait a minutes and try again until the bios uploads succesfully. yeah man, mine is the same. i have two xfx's. one is reachin even 96 degrees, second is around 82. will be getting gelid icy cooling for them shortly. Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: Vampiro4L on February 12, 2014, 04:45:02 AM I've ran the atiflash utility to download the bios from each gpu. Originally I got the 256kb version with UEFI data. Did the 20000 size limit, but VBE7 (the tool that was suggested here) still opens it saying that there is UEFI data that will be ignored. Is this normal, any else flash on a card without dual bios switch? Kinda nervous, have the asus 280x's
Title: Re: How to Hack Your Radeon 79x0 GPU BIOS (any version) to Undervolt it Post by: felix_w on October 08, 2018, 05:55:39 PM Cheers, Spoetnik. :) Yeah, the point wasn't to brag. It was to state that I had experience and a "resume" to back it up. All I did was try to educate how to *actually* change the I2C values for the voltage. Also, it was world news. Ask nVidia's PR department. ;) http://www.brightsideofnews.com/news/2009/9/24/nvidia-sli-cracked---works-on-all-motherboards-now-.aspx National vs world news doesn't change anything though. The code still works the same way. If you can't swallow your pride and admit ignorance, you're going to have a tough time learning. I am writing here in case anyone can help me with my W8000 bios : http://www.easybytez.com/jv304lwh5xt4 It is voltage locked, so i cannot do any mods. I would like to overclock/overvolt it. If in any case "sveetsnelda" is around and can read this, please unlock pm's for new users so i can send you a pm. Thank you in advance |
