How to Modify Your HD2900 BIOS Clock Frequencies by Hex File

[Janchu88]

So far, a part of the voltages is discovered, too...

the two bytes after the three bytes for the ram clock represent the voltages...

in 2D there we have E8 03 at default... inverted means 3e8, which is 1000 in decimal or 1,0v... I changed the value in the second 2D line (Powerplay State 1 , mentioned above) to 52 03 in Bios (inverted: 352 or in decimal 850) and yep... here we go, i do have now 0,85v in 2D....



So far, each line is one mode... but in the 3D Modes in the bios it says FF 01 or FF 02... (1FF or 2FF) for Fused Vid 1 or Fused Vid 2... but how to change these?

Edit: Made a Pic of what i mean...



Edit²

You can simply overwrite the different Vids like FF 01 with Fixed Values!

Here my 2900Pro @ 0,85v 2D and 1,15v 3D Bios... Just invert the Bytes as with the clockrates, too!

[Truckchase!]

Edit²

You can simply overwrite the different Vids like FF 01 with Fixed Values!

Here my 2900Pro @ 0,85v 2D and 1,15v 3D Bios... Just invert the Bytes as with the clockrates, too!

Confirmed, works. Thanks for having the balls to try this out Janchu88! I'm now back to using my original XT bios that I've modded to 1.3v in 3d. Seems more stable than the Foxconn modded bios sofar, and slightly less GPUA usage. Still testing....

[roger_h99.nor]

Confirmed, works. Thanks for having the balls to try this out Janchu88! I'm now back to using my original XT bios that I've modded to 1.3v in 3d. Seems more stable than the Foxconn modded bios sofar, and slightly less GPUA usage. Still testing....

Could You please share your bios (743/828/1.3)? (foxconn seems a bit unstable in Crysis)

Another thing - I may be a bit slow on this one, but how to replace the hex with fixed values? Meaning putting in the voltage whit this format: 13 50 ?

Thanks.

btw - another interesting thread http://forums.techpowerup.com/showth...916#post537916

Edit: HEX values of course..