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Topic: One way to undervolt R9 300 series cards by BIOS mod (Read 27086 times)

member
Activity: 116
Merit: 10
Dumb question, but is there no way to undervolt the card if the bios is unmodded (r9 390 Asus Strix)

You should be able to mod the 390 BIOS with HawaiiBiosReader. For me with the XFX R9 390, The -100mV from the MSI afterburner is not enough.
newbie
Activity: 5
Merit: 0
Dumb question, but is there no way to undervolt the card if the bios is unmodded (r9 390 Asus Strix)
full member
Activity: 265
Merit: 100
hi,
am confused, i have a "Sapphire Radeon R9 390 NITRO Tri-X OC (UEFI / Backplate), 8 Go" it's the same for Nitro that i read above


 (
Sapphire 390 Nitro 1100mV ROM:

https://www.dropbox.com/s/gw0lhozg4hskz2a/sapp390_1100.rom?dl=0
)  

?

we are speaking about the same card ?

It is the same card, but don't take my word for it.
You can check the BIOS name in the upper right corner of Hawaii Bios Reader to be sure.

I will tell you a secret.  
In Hawaii Bios Reader if you click on VRM settings and there is a table with an entry which says 0x8D VDDC Offset, then you are in luck.
Because here you can enter a voltage offset that will apply to all DPM states from 1 to 7.  
If you would like an undervolt of, say -100mV, then you would enter a value of 65520.
If you need a different voltage and are not sure where the above value was derived, then PM me.
If you do this, then leave the voltage values untouched in the PowerPlay and LimitTables.
This will work only if Hawai Bios editor shows a table, which it does for my Sapphire Nitro cards.

Be sure to read the red text above the table and be sure you know what you are doing.


I tried the 1100 option and i got black screened in start up.... Sapphire NITRO R9 390 TRI_X 8gb
Anybody has a MODDED working bios?
newbie
Activity: 27
Merit: 0
Hi Everyone before open a topic i checked here does have any bios mod or not. Found only 1 of them which is not working/

I bought 8 r9, 390 ,8gb card and i need mod. Right now without modding i am getting 30-31 mhz but what i heard it can be push around 35-40.

Also i can use one mod for all card or all card need own mod bios?

I have bellow cards

1x Gigabyte Windforce

1x MSI AMD Radeon R9 390X 8GB

3 x ASUS STRIX R9 390 DC3OC 8GB GDDR5

1x POWERCOLOR R9 390 8GB

1X SAPPHIRE NITRO R9 390 8GB

1X MSI R9 390 8GB



I hope someone can help me.

Thanks
legendary
Activity: 1176
Merit: 1015
Anyone have any hints on how to get this card usable again?
My card is ASUS Strix 390 8GB.. If anyone has another BIOS file that might work, can we PM?

If it has dual bios, you can get the other bios.

It doesn't.

Original hynix-only bios if dooferorg still needs it, use dos atiflash:

https://ufile.io/ztip3

member
Activity: 116
Merit: 10
I'm a bit bummed with my ASUS Strix 390. I did a backup with ATIWinFlash, tried the voltage changes as outlined and it just crashes when attempting to mine.

To make matters worse, I re-flashed the backup bios that I made and now the card doesn't do ANYTHING in the ZCash miner. Just sits there with no apparent load change. What is really odd is that in Claymore ZCash miner it says 'Card recognized as Radeon 290' .. even though it's a 390 and the device manager says it's a 390 too.

I've tried reflashing a few times, done the driver removal (DDU) and reinstall and no joy.

I have it aside on a separate system as the only card. It is usable within Windows 10 for the desktop, although I've not done any 3DMark or FurMark testing with it.


Anyone have any hints on how to get this card usable again?


My card is ASUS Strix 390 8GB.. If anyone has another BIOS file that might work, can we PM?



If it has dual bios, you can get the other bios.
full member
Activity: 163
Merit: 100
I'm a bit bummed with my ASUS Strix 390. I did a backup with ATIWinFlash, tried the voltage changes as outlined and it just crashes when attempting to mine.

To make matters worse, I re-flashed the backup bios that I made and now the card doesn't do ANYTHING in the ZCash miner. Just sits there with no apparent load change. What is really odd is that in Claymore ZCash miner it says 'Card recognized as Radeon 290' .. even though it's a 390 and the device manager says it's a 390 too.

I've tried reflashing a few times, done the driver removal (DDU) and reinstall and no joy.

I have it aside on a separate system as the only card. It is usable within Windows 10 for the desktop, although I've not done any 3DMark or FurMark testing with it.


Anyone have any hints on how to get this card usable again?


My card is ASUS Strix 390 8GB.. If anyone has another BIOS file that might work, can we PM?

member
Activity: 116
Merit: 10
Yes, you would benefit from undervolting core regardless of the coin/algorithm used to mine it.
280W sounds high for mining ZEC.  You probably run with a high core clock.


Yes, my 6 x R9 390 at 1140/1500 gives 2200Sol/s/1700W with Claymore 11.1 . And on stock clocks I get only 2000 Sol/s, and unknown Watts. On Saturday I'll try to mod the bios and will see power consumtion.

P.S. If I send you the original bios and the modified one made by your manual can you please check it? I'm afraid to damage my card Sad

I've modded BIOS for my cards. 5 of 6 goes well with reduced voltage (power consumption reduced from 270W to 220W on the wall per card on default clocks Claymore Zcash miner 11.1). But the 6th works about a mnute or less and then halts. I've flashed back the "problem" card with its original rom.
What should I change in the ROM to get it work properly with low voltage?
And one more question. Nitro's default GPU clock is 1040 as I understood from your rom file. MSI has only 1005 as a default. Can I set GPU to 1040 for my card with 1106mv in DPM7 row? In what way can be overclocked cards with powersafe rom?

left is original, right is modded


For that card, you can just increase the voltage a bit.
newbie
Activity: 42
Merit: 0
Yes, you would benefit from undervolting core regardless of the coin/algorithm used to mine it.
280W sounds high for mining ZEC.  You probably run with a high core clock.


Yes, my 6 x R9 390 at 1140/1500 gives 2200Sol/s/1700W with Claymore 11.1 . And on stock clocks I get only 2000 Sol/s, and unknown Watts. On Saturday I'll try to mod the bios and will see power consumtion.

P.S. If I send you the original bios and the modified one made by your manual can you please check it? I'm afraid to damage my card Sad

I've modded BIOS for my cards. 5 of 6 goes well with reduced voltage (power consumption reduced from 270W to 220W on the wall per card on default clocks Claymore Zcash miner 11.1). But the 6th works about a mnute or less and then halts. I've flashed back the "problem" card with its original rom.
What should I change in the ROM to get it work properly with low voltage?
And one more question. Nitro's default GPU clock is 1040 as I understood from your rom file. MSI has only 1005 as a default. Can I set GPU to 1040 for my card with 1106mv in DPM7 row? In what way can be overclocked cards with powersafe rom?

left is original, right is modded
https://www.dropbox.com/s/3dxzo8emvgz5ybf/screen_2017-01-22_23-31-51_window.png?dl=0
full member
Activity: 279
Merit: 104
Yes, you would benefit from undervolting core regardless of the coin/algorithm used to mine it.
280W sounds high for mining ZEC.  You probably run with a high core clock.
newbie
Activity: 42
Merit: 0
And one more question.

Is it worth undervolting for Zcash mining? Will it give any profit?
Now my r9 390s run on stock clocks with 350Sol/280W per card

Thanks
full member
Activity: 279
Merit: 104
Yes, it should work on all Hawaii cards, although I have only been able to verify it work  on
XFX,Sapphire Nitro and Asus  390-cards
newbie
Activity: 42
Merit: 0
Hello,

Will the method form the first post work on MSI R9 390? What version of drivers are required? I'm running on Win7 x64 with 15.12 Catalyst

Thanks
newbie
Activity: 14
Merit: 0
Thanks for the tutorial ill definitely need it, any chance you know a good Hawaii Bios editor for Mac?

 Smiley
full member
Activity: 279
Merit: 104
Any bios sapphire r9 380 nitro 4gb samsung memory?

Just download & use the Tonga Bios editor to edit the voltages and frequencies.  You can also look up nerdralph's thread on how to modify the memory timings to increase hash rates further.  For that you will need to use a hex editor after which you will again need to open the bios file in Tonga BIOS editor to fix the checksum.   My Sapphire 380X does 23.5 MH/s mining ETH/ETC and it is running at 1000/1650 core/mem.
member
Activity: 94
Merit: 10
Any bios sapphire r9 380 nitro 4gb samsung memory?
sr. member
Activity: 487
Merit: 266
somebody can help about gigabyte r9 390 undervolt?

I can not find anything on http://forums.guru3d.com/...


Simply set a fixed values for DPM7 (for instance 1000Mhs/1100mv), leave the rest on auto. I say this for 2 reasons:

1. When you mine, only DPM7 matters as it's the highest frequency
2. Your card doesn't have dual bios, so if you f things up, you should still be able to boot without issues.
sr. member
Activity: 302
Merit: 250
somebody can help about gigabyte r9 390 undervolt?

I can not find anything on http://forums.guru3d.com/...


You can follow the advice of the OP. But that is mainly giving fixed voltage to the various clock frequencies.
full member
Activity: 156
Merit: 100
somebody can help about gigabyte r9 390 undervolt?

I can not find anything on http://forums.guru3d.com/...
full member
Activity: 279
Merit: 104
hi,
am confused, i have a "Sapphire Radeon R9 390 NITRO Tri-X OC (UEFI / Backplate), 8 Go" it's the same for Nitro that i read above


 (
Sapphire 390 Nitro 1100mV ROM:

https://www.dropbox.com/s/gw0lhozg4hskz2a/sapp390_1100.rom?dl=0
)  

?

we are speaking about the same card ?

It is the same card, but don't take my word for it.
You can check the BIOS name in the upper right corner of Hawaii Bios Reader to be sure.

I will tell you a secret.  
In Hawaii Bios Reader if you click on VRM settings and there is a table with an entry which says 0x8D VDDC Offset, then you are in luck.
Because here you can enter a voltage offset that will apply to all DPM states from 1 to 7.  
If you would like an undervolt of, say -100mV, then you would enter a value of 65520.
If you need a different voltage and are not sure where the above value was derived, then PM me.
If you do this, then leave the voltage values untouched in the PowerPlay and LimitTables.
This will work only if Hawai Bios editor shows a table, which it does for my Sapphire Nitro cards.

Be sure to read the red text above the table and be sure you know what you are doing.

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