Been playing around with a stack of new nanos i got question for you Eliovp
great work by the way on the nano roms , I dont mind losing a few hashes to save almost 500 watts per rig lol
what is the difference between the -125 , -175 and -200 roms power ussage wise ?
I dont see much difference in hash rate at all basically none , and power usage going from the -175 to the -200 was not noticable ?
I know you said temps are better but temps seem the same to me.
thanks
Hey Marvel1, Thx, me neither, the energy was more important for me  The difference is basically only the supplied voltage for the memory. So no, you won't see a lot of difference, but a little none the less. Don't know if you tried already, but now that you're using stock -100mV core, you can still go lower, i have a lot of cards that are running for months @ -125mV and )112mV. There are a few that can't handle this that are @ -106mV. That'll bring down your power usage down even more! If you set your memory (as it is in the rom) to 300, the difference won't be large, but if you use stock memory (500), the card will stay a lot cooler and a lot more energy efficient. Although that i doubt that your cards can handle -175mV MVDDC when your memclock is at 500. (mine won't stay stable.) Greetings! |
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i've read that because of the memory bus of these gpu, they will not be good for etheruem, is this true? would be a major let down for me
Not because of the bus - there is still hope for much improvement if what i've heard is true - it might be 20mhs on 120w on 1070 but as for now it seems very dull As for amd - I think we will see same 20mhs at 150w with polaris Nah i don't think so. My nano's use 75w for 22Mh/s. So i doubt polaris will be the same |
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so 15% more than FuryX and 25% more than 980TI mmmmmm Not on every test though. Fury X scores better on the ocean surface test and the video composition test. I've seen other Fury x tests (oc'ed) where it owns the 1080 in almost every test. On the other hand, the 1080 oc'ed will likely score better again when oc'ed. AMD is announcing Polaris at computex . I'm curious |
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Okay...mission failed.
Successfully created rom with -125mV core voltage but upon starting mining, GPU crashed.
However, if I only reduce the voltage in the midst of mining, then it works fine. I'm guessing the starting voltage is too low perhaps.
I'm still trying to figure out how to reduce just the DPM7 voltage instead of a generic negative offset to all DPM. Any pointer, Eliovp?
Hey mate, Yeah, i had the same problems (booting issues), that's why i don't have any roms with lower core voltage than 100mV. when boot is done, you can still lower it with ab or trixx.. so that is what i do Open Fiji editor and give the DPM's a fixed state. That'll work just fine as well. It's a little more difficult because the controller won't be auto calculating those voltages anymore and will just use what you stated. So in some cases it won't be enough. Good luck! |
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The question is still there. Is it possible to mod memory voltage (not core or aux voltage) on Hawaii via bios editing?
I'm pretty sure it's possible on "hawaii" just haven't come across a 390 where it is.. But gupsterg will and can answer that better and more clearly :-) |
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What do you do after that? They're both as much "off the shelf" as the other.
I have those rig frame exactly like your's, its as simple as assembling legos. There is a lot more DIY involved in using wire shelves as base.
Are you saying those are prebuilt buyable kits ? If so where did you buy yours ? They are pre built buyable kits. You can buy them from me here https://gpurigs.com/products/gpu-mining-rig-frameHey, like the idea, nice that there are people out there making a little business out of this Wish you all the luck with that! Just a small thing, maybe you could be a little more competitive, you could opt to lower your prices a little bit. If i would be interested, i could get the same amount of hash, also prebuilt, for 200EUR cheaper. Although, have to say, the cards presented here are older and it would have to be shipped from Europe, wouldn't be as interesting for people from the US.. https://www.ethereumminer.nl/product/Ethereum-Mining-Rigs/ETH-MINER-120MH/Ethereum-Miner-110-120MH.html Good job none the less! Greetings! Thanks. LOL at that rig you linked, must be very old. R9 280's have been off the market for a couple of years that rig has 5 GPU's and the 280's will not hash over 20-21 MH/s. So either those are refurb'd GPU's or its a well used rig. Not sure about that. I am also far more competitive in price than the rest of the Eth mining rigs sellers on ebay. Go check the prices, you'll see my rigs listed there and they are at the right price point. After fees and taxes I'm NOT making a killing. Yeah, like i said, 280's so old cards i know haven't really checked for mining rigs, i always just buy gpu's and build em myself. But i guess you're right though Anyhow, wish you all the luck! greetings |
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I have been trying to undervolt and underclock a HD 7970 from MSI but the miner loads the dags and the gpu frequency is stock inders 900 or 890MHz and the vddc is higher than stock(reading form GPUz)
I am using 15.11.1 beta, win10 64 bit, either on ethminer or genoil miner
So if i read this correct, your core clock doesn't go higher than 900? Or what do you mean? Driver should be fine. It's probably an afterburner setting you're missing. Put your ab settings like this:  it has to do with windows 10 messing up the value i think, can you try on widnows 7?
Don't think it's Win10, never gave me issues. I had more issues with 7 though :p In the MSI afterburner, in the general setting, you need to tick "Force constant voltage". So that you can change the voltage.
I wouldn't do that. Force constant voltage <-- it will, like it states, force a constant voltage, so in other words, the higher your core clock goes, the more voltage your card will need to keep performing, when you select this, it will force the voltage you give it and will in most cases just fail because the card doesn't get enough power. Did you flash this card before? A bad rom could cause this yes. |
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Hello there, I followed the instructions of the op to undervolt my Gigabyte r9 390, but when I read the voltage values in the gpu freq table here is what I got :
0 0xA49D 300 Mhz 24-bit 0xA4A0 900
1 0xA4A2 525 Mhz 24-bit 0xA4A5 65282
2 0xA4A7 723 Mhz 24-bit 0xA4AA 65283
3 0xA4AC 883 Mhz 24-bit 0xA4AF 65284
4 0xA4B1 924 Mhz 24-bit 0xA4B4 65285
5 0xA4B6 960 Mhz 24-bit 0xA4B9 65286
6 0xA4BB 994 Mhz 24-bit 0xA4BE 65287
7 0xA4C0 1025 Mhz 24-bit 0xA4C3 65288
As you can see, excepting state 0, the other state voltages are not what I was waiting for.
Do you think it's safe to try values comparable to the values of the op ?
It is very safe to do. For my XFX 1015 MHz, I use the similar voltage as the OP, but is generally lower. OP is left mine right. 1000 800 1000 825 1050 850 1050 900 1100 950 1100 975 1100 1000 1106 1050 Yup, should be good! In the example given here, you give the DPM's a fixed state. It'll do the trick! Just be careful though, it could be that 1.05v is not enough power to handle 1025 core clock. All depends on your gpu. |
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Unfortunately, I don't have something a clean and nice looking as you. My GPUs are mounted on Lego buildings. I have only three for the moment, so it works, but it will be soon a big problem once I will have received the missing ones.
Get some wood, like i did, build em yourself. You'll even have fun doing it |
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What do you do after that? They're both as much "off the shelf" as the other.
I have those rig frame exactly like your's, its as simple as assembling legos. There is a lot more DIY involved in using wire shelves as base.
Are you saying those are prebuilt buyable kits ? If so where did you buy yours ? They are pre built buyable kits. You can buy them from me here https://gpurigs.com/products/gpu-mining-rig-frameHey, like the idea, nice that there are people out there making a little business out of this Wish you all the luck with that! Just a small thing, maybe you could be a little more competitive, you could opt to lower your prices a little bit. If i would be interested, i could get the same amount of hash, also prebuilt, for 200EUR cheaper. Although, have to say, the cards presented here are older and it would have to be shipped from Europe, wouldn't be as interesting for people from the US.. https://www.ethereumminer.nl/product/Ethereum-Mining-Rigs/ETH-MINER-120MH/Ethereum-Miner-110-120MH.htmlGood job none the less! Greetings! |
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I think I got it after googling around and comparing the rom that you made.
8D 00 F0 00 8E 00 E4 00
8D 00 F0 00 = offset for core voltage
Value F0 basically -16 * 6.25mV = -100mV
8E 00 E4 00 = offset for HBM voltage
Value E4 basically -28 * 6.25mV = -175mV
So, to further reduce core voltage, I assume just need to reduce F0 to EC so I'll get -125mV.
Yup, you're right! Are you going to be able to do it? Or shall i help? Remember to open your edited rom with fiji bios editor and save it with that to fix checksum. Greetings |
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I'm wondering how difficult is it to create a Nano rom with -120mV core voltage? With memory voltage at -175mV. Fiji bios editor doesn't have the option to change voltage I think. Have to edit the the rom through hex editor? I think my Nano is pretty stable at -120mV core voltage. Not "so" difficult.. Yes with an hex editor. If you want, i can make you one... Greetings! Yup, Eliovp = personal for when i'm at home (or on my phone) Ldw-com is when i'm at work/warehouse Cool , I thought somehow I'd been hacked  as I was reading 2 members posting things that only 1 could know  , then I thought perhaps their friends. So I thought I gotta register and ask . Expect your inbox to get flooded now that there is someone else to contact  Hmmm, I'll just have to not reply  . Been off and on lurking here, mainly to read things the Stilt has posted TBH. Nah, it's all me :-) Haven't seen the stilt here in a Long time tough.. Maybe now you're here he'll pop up ;-) |
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Eliovp, I had a look at the XFX 1015MHz BIOS you mod for Marvel. I search edfor the 8d 00 xx 00, I could not find that. Did you mod the Core or the memory voltage?
I remember you said both -100 mV for Core and memory.
I didn't add those values, i only changed the DPM states. Looking back at those, i will report back with a new one next week because it seems that i failed miserably on that one "XFX 390 for Marvel". Greetings |
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12kW to 6.6kW
Yellow is temporary "wall" personally i'm using acoustic panels where i can. Green is the GPU area which would be one wire shelf with multiple levels. Arrow is airflow. The opening is ideally a huge window that fit 20" fans or bigger or a doorway. Mine fit 18"*44* so i'm good for two boxfan and i'm dumping upward of 10kW outside.
From the outside you see 2 box fan and thats it.
What are the gpu's that you have to hit 12kW ? |
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So I first need to find the location of the VoltageObjectInfo.
To search for the start and length of the VoltageObjectInfo table I figure I need to locate the position of the following pattern: xx 00 03 01 01 03
where xx is the length in bytes of that table? (obviously omitting xx in the search pattern)
And then to see if I have a voltage offset entry, look for pattern 8d 00 xx 00 (omitting xx which is the actual voltage offset value)
within the VoltageObjectInfo table. Correct?
Atomic output will give you the offset location. It's all there , just open HxD and hit search, enter the offset there and it'll point you to the exact point If 8D 00 xx 00 isn't there, that means that "or it just isn't possible to mod, or you need to add that yourself", keep in mind, it's not just adding it into the rom, you'd have to follow some other steps to complete that process (as i stated before) - you need to correct table length for VoltageObjectInfo. - the pointer within VoltageObjectInfo to i2c programming data would need updating as well. - you also then need to remove the same amount of empty bytes to make UEFI/GOP at right offset location. - directory of data/command tables would need updating in ROM to correct offset pointers to the tables as they would have shifted. If it's there, then you just need to edit "xx" as i told you before If 8E is also there (is always right behind 8D) then you can also mod the memory voltage given to the controller. Greetings! |
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What is the position of the memory voltage setting in the BIOS file. I am interested in changing that.
open your rom with atomicbiosreader, you can find the offset location for the voltage settings in the .txt file that gets generated. you'll have to watch out though, not every rom has these values, my nano roms didn't have them, i had to add them myself. |
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ellovp - have you tried 8 x GPU setup.
I am thinking of doing this using 3 to 1 PCI riser on the 6th PCI slot.
That should get the MHs above 200MHs per rig.
Thoughts?
I am going using Claymore Dual miner for this rig.
thanks
I haven't tried with my nano's, i have tried to use a pci hub/splitter in the past, i still have 2 of them though. Maybe i'll play with them again sooner or later. But like it is now, 6 per rig is more than enough + i would need an extra PSU.. nahh i'm fine like this :p |
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just bought a couple of Nanos for a new ETh rig - cant wait to squeeze the daylights out of this brats with your mods...
.... so which one should I go for? Both looks good - with its own pros-cons....
134 Mh/s @ 2.25A, 495watt (6 Cards) stock settings rom
OR
185 Mh/s @ 4.8A, 1050 watt (6 Cards) 1020 Core, 300 Mem
I think I will go for 185 MH/s on a 1300 PSU.
Anybody have any list of "dos and donts" before I do this ?
Hey Citronick. Try the lower ones first. link: Here "-100mV mvddc to -150or the ones that work on every nano and that have helped a few others that i got messages from in PM. link: Here "-50mV mvddc & -100Start flashing with the -106mV mvddc and slightly go down. You can do a registerdump with AIDA64 and check out the voltage that is needed for your card to achieve 1000 core clock. The higher that voltage is, the higher your leakage of your card is and the lower the asic quality is. In other words, if your card doesn't need a lot of voltage to achieve that power. You can go ahead and flash -150, -175mV mvddc. "they're all -100mV Core clock." Greetings! thanks - good points - yes i will go through step by step, these are expensive items so I wouldn't want to brick it Wow 100 of these babies would be sweet..... open rig or hosted DC? Open, You can see them "here"greetings |
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just bought a couple of Nanos for a new ETh rig - cant wait to squeeze the daylights out of this brats with your mods...
.... so which one should I go for? Both looks good - with its own pros-cons....
134 Mh/s @ 2.25A, 495watt (6 Cards) stock settings rom
OR
185 Mh/s @ 4.8A, 1050 watt (6 Cards) 1020 Core, 300 Mem
I think I will go for 185 MH/s on a 1300 PSU.
Anybody have any list of "dos and donts" before I do this ?
Hey Citronick. Try the lower ones first. link: Here "-100mV mvddc to -150or the ones that work on every nano and that have helped a few others that i got messages from in PM. link: Here "-50mV mvddc & -100Start flashing with the -106mV mvddc and slightly go down. You can do a registerdump with AIDA64 and check out the voltage that is needed for your card to achieve 1000 core clock. The higher that voltage is, the higher your leakage of your card is and the lower the asic quality is. In other words, if your card doesn't need a lot of voltage to achieve that power. You can go ahead and flash -150, -175mV mvddc. "they're all -100mV Core clock." Greetings! thanks - good points - yes i will go through step by step, these are expensive items so I wouldn't want to brick it You'll have to do crazy things to brick one Again, as i mentioned before, got 100 of those, flashed them all individually more than 3 times They're all still running at max 60 degrees |
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That is great effort. Are you going to release your XFX R9 390 BIOS mod soon? We are looking forward to it.
As soon as i can :p Got so many things that i still have to do these days. I wouldn't mind a few days with more than 24hrs in it :p What about your experience with "intensity" in ethereum mining config? 800 core and 300 mem of course...
What exactly do you mean by that agente? |
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