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Help XFX 7970 FX-797A-TDFC voltage lock

post #1 of 3
Thread Starter 
I have been all over many forums trying to find a modified bios or a way to modify my Bios to unlock voltage beyond 1.175 V

I have 2x FX-797A-TDFC from XFX, I chose these cards because XFX generally has good support and a lifetime warranty.....

Is there a program to edit my current Bios or can someone do it for me I have used VBE7 but it wont allow me to change the voltage any higher.

I found another Bios for a DD XFX 7970 that VBE7 will allow the voltage to go to 1.238V and even higher but I am afraid to chose the wrong BIOS and brick the card.(i have two other cards i should be able to use to unbrick but I would still prefer to do it right the first time)

Current Factory BIOS

http://www.techpowerup.com/vgabios/131977/XFX.HD7970.3072.120715.rom

The one I want to attempt to use

http://www.techpowerup.com/vgabios/132565/XFX.HD7970.3072.120718.rom

the device ID match in both bios but the stock bios has Subsystem ID 3212 and the new bios has 3214.

I can edit the subsystem ID to match the stock BIOS and attempt to flash it.

for the record I am doing this in attempts to increase my LTC mining output

maybe there is a different BIOS editor I can increase my voltage in the Stock Bios ?.
post #2 of 3
You can use another bios, but it would have to have the same vrm type to work correctly. You would have to change the sub system id, vendor id (if another brand), bios version number (for locked cards). You can use the tool to mod the clocks an voltage, and system id but the rest has to be modded in hex.
Intels D.C.
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Intels D.C.
(14 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i-7 4790K 4.8Ghz core 1.263v, 4.4Ghz V.ri... MSI Z97 Gaming 9 AC XFX R9 290 1050core 1350ram XFX R9 290 1050core 1350ram 
RAMHard DriveHard DriveHard Drive
Corsair Dominator GT 4x4GB 2133Mhz OC to 2400M... Western Digital Black Sata iii Western Digital Green Sata iii Intell power Corsair GS sata iii SSD 180 GB 
Optical DriveOptical DriveCoolingOS
Lg CD/DVD Burner internal Drive Lg CD/DVD Burner external drive  Coolgate 360 Rad 60mm, Coolgate 240 Rad 60mm, K... Windows 7 64Bit Ultimate 
PowerCase
Corsair AX1200i Sleeved NZXT Switch 810/ 11 Corsair sp120 high flow fan... 
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post #3 of 3
I actually have the FX-797A-TDJC...but i imagine its very .simulare i tried to mod the bios and computer would lock up after booting up......i even tried fashing the 280x bios onto it.....that was real bad idea...had to put in a different video card just to be able to flash it back to stock bios......even without a bios switch its fixable.......even if you brick it like i did last night.....so don't panic its fixable if you have a spare card in case the flashed one gets bricked.

so far its an ok card.....just not much can be done with flashing from what ive been able to tell so far......i read another thread where someone was using a gigabyte rom but who knows what exact card he had as well...cause he didn't say

I will say this...i dont want to have to cram my old geforce 280 back into my board just to restore the factory bios on my amd card...it was a pain...but at least it fixed easy enough
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