How to Modify Your HD2900 BIOS Clock Frequencies by Hex File

[mossad]

this is my original sapphire bios : http://www.mediafire.com/?7bgddxsjnlh
as u wish ;]
also i tried some util especialy for 2900xt bios edit oc but i dunno if it was that from foxconn but it wont work for my 256bit card cause there were no frequencies in the boxes where they had to be

[roger_h99.nor]

Thanks - will have a look at it.

Tried this tool?
http://rapidshare.com/files/71500253...IOS_Editor.zip

[roger_h99.nor]

Found it.
The 256 bit did look a bit differnt from the 512bits bioses.
(no 'D9-00-04-01' section)

RED is Core clock
GREEN is Mem clock
Blue is Vcore.

[MGreg]

Hey, I've been using the QuantumForce2900BiosEditor
and have adjusted my speeds to 850/900 for my cards in crossfire.
1.15V 3d

I was wondering if anyone can help me figure out how to change 2d voltage and possibly even lower then 1.15V 3d voltage.
Also where the 2d/3d clocks are in the bios, I have been trying to figure out why I can't find the same numbers in the bios as in posts in this thread.
My attempts haven't worked. I have 2 512MB XT's. So far the HIS bios works well for me.

http://www.techpowerup.com/vgabios/

[mossad]

Found it.
The 256 bit did look a bit differnt from the 512bits bioses.
(no 'D9-00-04-01' section)

RED is Core clock
GREEN is Mem clock
Blue is Vcore.

hi there again, that tool is that i tried that quantum blahblah but it have all the boxes with VIDs and GPU MEM freq. grey and i am unable to fill it with something, also there r no walues readed from bios so i think it dont really work with 256bit ;] (like Rabit bios editor - read only card name, vendor id, but no freq, etc)
and next point in your video bios guide i dont understand, what is kind of 01 FF, cause in 2d i c there is 1000 which is 1.0V and that is correct, but FF01 is 65281 which is relatively close to FFFF which is maximal walue for 4 byte string in dec it gives 65535 , but no sense to me how to edit this kind of value of voltage ;] my tinny brain dont accept this
and editing 2d voltage will be good but no such as good as 3d voltage... if there will be no way i can hard mod it like some 2900gt voltmod if there is something of this way?
this or that way i appreciate your help Roger.

[roger_h99.nor]

QantumForce bioseditor seems not to recognize the 256 bit bios. (I tried)
Rabit does not support the 2900 bioses (as yet).

FF01 seems to be a 'proxy' - pointing somewhere els in the bios-file to the 3d voltage. FF01 is safe to overwrite with the HEX value corresponding to the desired voltage.
How to do this is described earlier in this thread. (remeber to invert the hex numbers!)

[mossad]

had i to do something with bios CRC on asus P965 board or its only problem of dfi and some other brand as i readed here?

[mossad]

FF01 seems to be a 'proxy' - pointing somewhere els in the bios-file to the 3d voltage. FF01 is safe to overwrite with the HEX value corresponding to the desired voltage.
How to do this is described earlier in this thread. (remeber to invert the hex numbers!)

i just tried to mod my 2d, so now i am on 399/405 instead of 507/513 but i tried to modify voltages too, so my lines now seem this: DC 9B 00 34 9E 00 84 03
399 / 405 / 900 (0.9V) but rivatuner is stil reading 1V, first i tried 0.95 then i thinked its too small to be seen but either 0.9v isnt working, so can be voltages regulated at other place ?
i just not tested 3d voltages yet...

edit: i unpluged 2 ground cables from 8pin so now its only 6pin conected, so there isnt active overdrive in CCC, so now 0.9V for 2d normally works which is good... so there had to be only 6pin in 8pin cause other hand it seems that if overdrive is active CCC is controling voltages and 3d speeds more than bios...

[ZeRo4u]

i just tried to mod my 2d, so now i am on 399/405 instead of 507/513 but i tried to modify voltages too, so my lines now seem this: DC 9B 00 34 9E 00 84 03
399 / 405 / 900 (0.9V) but rivatuner is stil reading 1V, first i tried 0.95 then i thinked its too small to be seen but either 0.9v isnt working, so can be voltages regulated at other place ?
i just not tested 3d voltages yet...

edit: i unpluged 2 ground cables from 8pin so now its only 6pin conected, so there isnt active overdrive in CCC, so now 0.9V for 2d normally works which is good... so there had to be only 6pin in 8pin cause other hand it seems that if overdrive is active CCC is controling voltages and 3d speeds more than bios...

What planet do you come from?

here some bios tools: http://www.tinyurl.com/37t2h3

[s0lid]

Could some body fix this bios files Checksum from 0DA0F to 0BD00

I'll try fix that by myself but it might take loong time ^^

[s0lid]

Ok checksum is now 0BD00 but could somebody check does these mods kill my 2900 pro ?

That is modified 2900 XT bios where i've changed device ids and bios version infos to pros Just in hope than with modded XT bios i get better OC
for exsample XT is 602-103 and Pro 605-100

is important than my radeon 2900 pro is still pro even when i flash that bios
I get more points as Pro in hwbot ^^