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Title: 7970 undervolting Post by: cmg5461 on April 05, 2012, 04:34:10 AM http://puu.sh/nZjg
http://puu.sh/nZjD Still venturing lower :D Clock: 1000mhz Memory: 710mhz Voltage: 0.968 Mhash/s: 580 Power based on GPU-Z (12.09v * 10.5A) = 127W Take into account 85% efficienct: 127*1.15 = 146W 580/146W = 3.97 Mhash/W :) Update: Dropped voltage down to .955v 100% stable. http://puu.sh/o2Hi (12.09v * 10.2A) = 123.3W 85% efficiency: 123.3*1.15 = 141.8W 580/141.8 = 4.09Mhash/W Title: Re: 7970 undervolting Post by: DeathAndTaxes on April 05, 2012, 02:20:03 PM 85% efficiency? Get a better PSU.
Also would be nice if you have/get a Kill-A-Watt so you can compare calculated load @ wall w/ actual load at wall. Title: Re: 7970 undervolting Post by: Buckwheet on April 05, 2012, 02:22:04 PM Also what card are you using? I seem to have better luck with the Black Edition cards as they appear to be higher binned.
Title: Re: 7970 undervolting Post by: cmg5461 on April 05, 2012, 03:46:23 PM 85% efficiency? Get a better PSU. Also would be nice if you have/get a Kill-A-Watt so you can compare calculated load @ wall w/ actual load at wall. Working on it. And it's in the computer I'm running now. When I upgrade I'll buy a higher quality one. wow, what programs do you use to set the clock speed/memory/voltage? For a long time i was running mine at 978mhz 1.043v with MSI afterburner beta Msi afterburner. I downclock memory in cgminer, because afterburner doesn't like to lower it past 850. Also what card are you using? I seem to have better luck with the Black Edition cards as they appear to be higher binned. xfx 7970 black edition. 76.7% ASIC quality Title: Re: 7970 undervolting Post by: Gomeler on April 05, 2012, 04:23:41 PM 85% efficiency? Get a better PSU. Also would be nice if you have/get a Kill-A-Watt so you can compare calculated load @ wall w/ actual load at wall. Very interesting. Also interested in the actual load as I don't believe the input power for the memory, while tiny, is included. Might be time to pick up a used 7970 myself. Title: Re: 7970 undervolting Post by: bulanula on April 05, 2012, 04:39:01 PM Quote xfx 7970 black edition. 76.7% ASIC quality How do you get ASIC quality in the 7xxx cards ? Thanks ! Title: Re: 7970 undervolting Post by: Buckwheet on April 05, 2012, 07:11:34 PM Quote xfx 7970 black edition. 76.7% ASIC quality How do you get ASIC quality in the 7xxx cards ? Thanks ! Its built into GPU-Z as far as I am aware. Title: Re: 7970 undervolting Post by: scifimike12 on April 05, 2012, 07:51:11 PM 85% efficiency? Get a Fixed that for you. Remember, just because a PSU is rated at 80+ Bronze, Silver, Gold, etc. doesn't mean it is "high quality". I'd rather take an Antec TruePower New over a ABS Majesty or Mushkin Enhanced any day of the week. How do you get ASIC quality in the 7xxx cards ? Thanks ! Right-click the toolbar and select Read ASIC quality... Title: Re: 7970 undervolting Post by: cmg5461 on April 05, 2012, 08:18:12 PM 85% efficiency? Get a better PSU. Also would be nice if you have/get a Kill-A-Watt so you can compare calculated load @ wall w/ actual load at wall. Very interesting. Also interested in the actual load as I don't believe the input power for the memory, while tiny, is included. Might be time to pick up a used 7970 myself. Does not matter. Voltage is read going into the card as well as the amperage. Memory voltage is drawn off that main voltage. Title: Re: 7970 undervolting Post by: DeathAndTaxes on April 05, 2012, 09:05:05 PM 85% efficiency? Get a better PSU. Also would be nice if you have/get a Kill-A-Watt so you can compare calculated load @ wall w/ actual load at wall. Very interesting. Also interested in the actual load as I don't believe the input power for the memory, while tiny, is included. Might be time to pick up a used 7970 myself. Does not matter. Voltage is read going into the card as well as the amperage. Memory voltage is drawn off that main voltage. Of course it matters. The recorded CURRENT is VDDC which does not power the memory (or I/O). A separate VRM provides CURRENT for memory, a third provides voltage for IO functions. While the voltage remains the same without knowning the VDDCI & MVDDC current you don't know entire card consumption. Total Power Consumption = Voltage * (VDDC current + VDDCI current + MVDDC current) Title: Re: 7970 undervolting Post by: bulanula on April 05, 2012, 10:22:54 PM Quote xfx 7970 black edition. 76.7% ASIC quality How do you get ASIC quality in the 7xxx cards ? Thanks ! Its built into GPU-Z as far as I am aware. I meant with Linux. Just like you cannot use GPU-Z to see VRM temperatures. Has anyone tried with WINE and GPU-Z ??? Title: Re: 7970 undervolting Post by: cmg5461 on April 05, 2012, 10:46:49 PM Title: Re: 7970 undervolting Post by: Graet on April 06, 2012, 06:45:43 AM cgminer.exe -o http://us.ozco.in:8332 -u graet.20 -p p -o http://eu.ozco.in:8332 -u graet.20 -p p -I 9 -k poclbm --auto-fan --gpu-engine 1140-1180 --auto-gpu --gpu-memdiff -150 --gpu-vddc 0.88 --temp-overheat 95
gives me 704Mhash @ 74 deg on one card, 680mh @ 83deg on other. Title: Re: 7970 undervolting Post by: Roadhog2k5 on April 07, 2012, 03:21:28 AM I found HWinfo was pretty much in line with my calculated figures. https://bitcointalk.org/index.php?topic=57410.0 Title: Re: 7970 undervolting Post by: lightlord on May 13, 2012, 08:56:48 AM cgminer.exe -o http://us.ozco.in:8332 -u graet.20 -p p -o http://eu.ozco.in:8332 -u graet.20 -p p -I 9 -k poclbm --auto-fan --gpu-engine 1140-1180 --auto-gpu --gpu-memdiff -150 --gpu-vddc 0.88 --temp-overheat 95 gives me 704Mhash @ 74 deg on one card, 680mh @ 83deg on other. Actually found out to be false. I got the exact same temperatures. But I checked gpuz sensors and found out cgminer under-volt does nothing. How ever I tried msi after burner lastest version undervolting and going down any where near 0.88 just crashes and ati driver stops responding. I did mange to go from 1174>1156 A read out drop on the sensor from 1.07>1.04 VDDC And any lower it crashes at 1180 OC The above numbers are impossible, just fallacy. I thought it was working too as well, and I realized it wasn't Download GPU-Z You aren't going mange a 20% under volt with a 930>1180! Dream on, getting a 15% higher clock and 20% under volt is everyone's dream. That simply can't be done. Title: Re: 7970 undervolting Post by: jjiimm_64 on May 13, 2012, 05:01:16 PM I am running them at 930/800/0.937v downvolt with msiafterburner, close AB start cgminer with conf file. pulling 830watts at the wall. 3.33 Mh/watt Code: cgminer version 2.3.6 - Started: [May 10, 2012, 8:52 am] Rig:miner19 Title: Re: 7970 undervolting Post by: Graet on May 13, 2012, 05:09:44 PM cgminer.exe -o http://us.ozco.in:8332 -u graet.20 -p p -o http://eu.ozco.in:8332 -u graet.20 -p p -I 9 -k poclbm --auto-fan --gpu-engine 1140-1180 --auto-gpu --gpu-memdiff -150 --gpu-vddc 0.88 --temp-overheat 95 gives me 704Mhash @ 74 deg on one card, 680mh @ 83deg on other. Actually found out to be false. I got the exact same temperatures. But I checked gpuz sensors and found out cgminer under-volt does nothing. How ever I tried msi after burner lastest version undervolting and going down any where near 0.88 just crashes and ati driver stops responding. I did mange to go from 1174>1156 A read out drop on the sensor from 1.07>1.04 VDDC And any lower it crashes at 1180 OC The above numbers are impossible, just fallacy. I thought it was working too as well, and I realized it wasn't Download GPU-Z You aren't going mange a 20% under volt with a 930>1180! Dream on, getting a 15% higher clock and 20% under volt is everyone's dream. That simply can't be done. BUT the wattmeter plugged into the wall reads substantially lower, even though cgminer reports no change, proof is in the draw from the wall. fallacy all you like Title: Re: 7970 undervolting Post by: ddd1 on May 13, 2012, 11:20:15 PM Do you guys use gpu-z/hwinfo64 to determiner the "real" VDDC?
Because It seems if you put VDDC in MSI AB it shows different in GPU-z. Also Ive read there are different voltage leak on 7970, if memory serves me correct there is 1.17v, 1.111v and 1.05v. So if you have the 1.111v card then putting 1.117v in Afterburner in reality gives 1.111v. So if you put +0.020v in MSI AB so it is 1.190v in truth if you have a 1.111v card the "real" VDDC is 1.131v. I think the above is true? Title: Re: 7970 undervolting Post by: lightlord on May 14, 2012, 01:15:43 AM I have a wattage meter device, and dropping 1174>1156 drops watts, but actually putting in 0.86 in Cgminer does completely nothing.
Wattage does stay same. Stayed at 430>430, no drop. I really think you are miss looking over the numbers. Stock at 0.936 Volts is possible, but 1180/1100 at 0.86 is not possible. Title: Re: 7970 undervolting Post by: jjiimm_64 on May 14, 2012, 02:37:39 AM I have a wattage meter device, and dropping 1174>1156 drops watts, but actually putting in 0.86 in Cgminer does completely nothing. Wattage does stay same. Stayed at 430>430, no drop. I really think you are miss looking over the numbers. Stock at 0.936 Volts is possible, but 1180/1100 at 0.86 is not possible. i would have to agree. i am doing 930 at 0.937v. at 940 I was dropping cards. at 930 you can see from my last post the rig has been up for days now. Title: Re: 7970 undervolting Post by: lightlord on May 14, 2012, 03:49:32 AM Okay I have tempered, and lowered the clocks very slowly, Btw the longer you run the hard ware the lower the voltage can go. After one year my Cpu was able to undervolt from 1.45>1.1875 Stable.
Where it used to not be stable at 1.35 or so. Its interesting. 7970 Stable Clocks --------------------- 1180 Core Clock, 700 Mhash, Msi after burner: 1174 -> 1156 MV -> Gpu-Z sensor: VDDC 1.04 Volts (Any lower Crashes) 1100 Core Clock, 650 Mhash, Msi after burner: 1174 -> 1068 MV -> Gpu-Z sensor: VDDC 0.988 Volts (Any lower Crashes) 1025 Core Clock, 600 Mhash Msi after burner: 1174 -> 1024 MV -> Gpu-Z Sensor: VDDC 0.949 Volts (Any lower Crashes) Seems like a diminishing return curve, around Core 1100, I yield the most mhash to least power/voltage. 1180 being least efficient, lower then 1100 being less efficient. Title: Re: 7970 undervolting Post by: lightlord on May 14, 2012, 04:00:49 AM Now going to push my card as high as it goes in core clock before crash. Lucky the new drivers just make it not respond and I don't have to restart computer really nice for over clocking.
Btw over clocking isn't what is dangerous, its overvolting that is. So If I yeilded 1154 MV from 1174 MV at 1180, at stock 1174 MV I should get around 1200 + Title: Re: 7970 undervolting Post by: lightlord on May 14, 2012, 04:11:12 AM at 1230, it crashes within 5 seconds
at 1225, it crashes within 45 seconds at 1220, it crashes within 2 mins with strange artifacts at 1215, Currently running haven't crashed yet (Updated Just crashed) at 1210, Trying now (crashed 10 mins) at 1205, (crashed 10 mins) at 1200 (20mins) Threw the clock to 1190, hopefully it will be stable 24/7 at this when I go to sleep. Title: Re: 7970 undervolting Post by: ddd1 on May 15, 2012, 08:45:30 PM at 1230, it crashes within 5 seconds at 1225, it crashes within 45 seconds at 1220, it crashes within 2 mins with strange artifacts at 1215, Currently running haven't crashed yet (Updated Just crashed) at 1210, Trying now (crashed 10 mins) at 1205, (crashed 10 mins) at 1200 (20mins) Threw the clock to 1190, hopefully it will be stable 24/7 at this when I go to sleep. So you are testing stability with mining? Which drivers cause PC to just crash and not shut off? Title: Re: 7970 undervolting Post by: goxed on May 24, 2012, 06:05:14 AM Is there any software compiled for Linux that can allow me to under volt reference 7970 cards?
Title: Re: 7970 undervolting Post by: crazyates on May 24, 2012, 02:23:03 PM at 1230, it crashes within 5 seconds at 1225, it crashes within 45 seconds at 1220, it crashes within 2 mins with strange artifacts at 1215, Currently running haven't crashed yet (Updated Just crashed) at 1210, Trying now (crashed 10 mins) at 1205, (crashed 10 mins) at 1200 (20mins) Threw the clock to 1190, hopefully it will be stable 24/7 at this when I go to sleep. So you are testing stability with mining? Which drivers cause PC to just crash and not shut off? I'm not using a 7970, but with Win7x64 and 12.4, if I OC too much, my screen flickers a few times and I get a warning that my graphics driver stopped responding. CGMiner is still open, but doesn't hash. Title: Re: 7970 undervolting Post by: jjiimm_64 on May 24, 2012, 03:09:35 PM my .2 bitcents... stop trying to put gpus into warp drive... also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference Title: Re: 7970 undervolting Post by: cmg5461 on May 24, 2012, 04:07:27 PM my .2 bitcents... stop trying to put gpus into warp drive... also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference huge difference for an extra 750Mhash :p Title: Re: 7970 undervolting Post by: jjiimm_64 on May 24, 2012, 04:16:07 PM my .2 bitcents... stop trying to put gpus into warp drive... also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference huge difference for an extra 750Mhash :p so you going to pay 600 watts for 750 mhash? do you have free electric? lets put this into perspective: 600 watts is ~ 47.50 $ at .11 p/kwh 750M at current diff is $66.16 per month so to make all that extra heat, you pay 20 bucks a month! you loose money to over clock that much Title: Re: 7970 undervolting Post by: crazyates on May 24, 2012, 04:18:46 PM my .2 bitcents... stop trying to put gpus into warp drive... also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference huge difference for an extra 750Mhash :p As much as I like my OC and squeezing every last hash out of my cards, there is a case for downclocking. Adding an extra 600W for 750MH/s is quite inefficient... Title: Re: 7970 undervolting Post by: jjiimm_64 on May 24, 2012, 04:20:58 PM my .2 bitcents... stop trying to put gpus into warp drive... also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference huge difference for an extra 750Mhash :p As much as I like my OC and squeezing every last hash out of my cards, there is a case for downclocking. Adding an extra 600W for 750MH/s is quite inefficient... that is an understatement.. it costs money 600 watts is ~ 47.50 $ at .11 p/kwh 750M at current diff is $66.16 per month Title: Re: 7970 undervolting Post by: joshv06 on May 24, 2012, 04:29:34 PM Yes I agree, I think it's best to push for best Mhash/W optimum profits, rather than just trying to get the most Mhash.
Title: Re: 7970 undervolting Post by: goxed on May 25, 2012, 12:30:04 AM Can I undervolt a 7970 card in Linux?
Title: Re: 7970 undervolting Post by: cmg5461 on May 25, 2012, 12:34:22 AM my .2 bitcents... stop trying to put gpus into warp drive... also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference huge difference for an extra 750Mhash :p so you going to pay 600 watts for 750 mhash? do you have free electric? lets put this into perspective: 600 watts is ~ 47.50 $ at .11 p/kwh 750M at current diff is $66.16 per month so to make all that extra heat, you pay 20 bucks a month! you loose money to over clock that much You didn't see my sarcasm there :p Title: Re: 7970 undervolting Post by: ThiagoCMC on August 14, 2012, 07:19:35 AM Can I undervolt a 7970 card in Linux? AMDoverdrive ?! It is on my queue to undervolt my 7970 under Ubuntu Linux 64 bits / Catalyst 12.6 / CGMiner 2.6.4... If anyone already does that, please, share it! Cheers! Thiago Title: Re: 7970 undervolting Post by: ThiagoCMC on August 14, 2012, 07:29:46 PM I'll try this one under Ubuntu Linux 12.04 64 bits:
http://sourceforge.net/projects/amdovdrvctrl/ Title: Re: 7970 undervolting Post by: goxed on August 15, 2012, 01:25:21 AM I'll try this one under Ubuntu Linux 12.04 64 bits: http://sourceforge.net/projects/amdovdrvctrl/ Is ADL able to undervolt in Linux? I think CGMINER uses ADL, and it doesn't work for me in Linux. What works for me is flashing a 7950 BIOS to a 7970 card. Reduces the voltage to 1.03V or so. I would be very interested in the undervolting results using amdovdrvctrl on Tahiti chips. Title: Re: 7970 undervolting Post by: ThiagoCMC on August 16, 2012, 05:29:17 AM Okay, it is impossible to undervolt those cards under Linux... Damn...
Title: Re: 7970 undervolting Post by: btcnut on September 05, 2012, 02:55:01 PM I am running them at 930/800/0.937v downvolt with msiafterburner, close AB start cgminer with conf file. pulling 830watts at the wall. 3.33 Mh/watt Code: cgminer version 2.3.6 - Started: [May 10, 2012, 8:52 am] Rig:miner19 Are you running all 7970's? What drivers and setup are you using to get windows to recognise all 5 GPU's? Are you using XP/Vista/Windows 7? 32bit or 64bit? I cant for the life of me get more than 4 gpus going at once. Title: Re: 7970 undervolting Post by: Mousepotato on September 11, 2012, 08:47:50 PM Wait, how are you guys undervolting with MSI Afterburner? My voltage slider is blank... is there some option/setting I have to turn on or something?
Title: Re: 7970 undervolting Post by: crazyates on September 11, 2012, 08:49:46 PM Wait, how are you guys undervolting with MSI Afterburner? My voltage slider is blank... is there some option/setting I have to turn on or something? Go to settings, and unlock voltage control. If that doesn't work, your BIOS is voltage locked. Title: Re: 7970 undervolting Post by: Mousepotato on September 11, 2012, 09:15:54 PM Wait, how are you guys undervolting with MSI Afterburner? My voltage slider is blank... is there some option/setting I have to turn on or something? Go to settings, and unlock voltage control. If that doesn't work, your BIOS is voltage locked. Title: Re: 7970 undervolting Post by: drakoin on December 30, 2013, 02:41:31 AM If that doesn't work, your BIOS is voltage locked. And what do I need to do then?? I have: 1 PowerColor HD 7850 (AX7850 2GBD5-DH) with 85.3% ASIC quality 1 XFX R7970 DD (FX-797A-TDFC) with 68.6% ASIC quality How to unlock the voltage control? Thanks! Title: Re: 7970 undervolting Post by: cryptmebro on January 05, 2014, 12:39:32 AM If that doesn't work, your BIOS is voltage locked. And what do I need to do then?? I have: 1 PowerColor HD 7850 (AX7850 2GBD5-DH) with 85.3% ASIC quality 1 XFX R7970 DD (FX-797A-TDFC) with 68.6% ASIC quality How to unlock the voltage control? Thanks! http://www.techpowerup.com/forums/threads/vbe7-vbios-editor-for-radeon-hd-7000-series-cards.189089/ http://www.freedos.org/download/ http://www.techpowerup.com/downloads/2306/atiflash-4-17/ OR you can skip freedos and get ATIwinflash instead. http://www.techpowerup.com/downloads/2311/ati-winflash-2-6-7/ ATIflash (dos version) Important, so you don't flash the wrong card/bios (not necessary for winflash.) http://www.techpowerup.com/forums/threads/how-to-use-atiflash.57750/ I used the command: "atiflash.exe -p 1 xxxx.rom -f " to flash my second card. This was all that was needed for a Sapphire 7950. Be sure to do atiflash.exe -i OR -ai to get adapter information to be sure you are flashing the correct card. |