weird.... there are some very minor differences between the bioses that I can't account for...
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What is your max memory clocks with your bios..?
@Martin.
Could you please explain what we could learn from those 2 links you provided?
Regards.
Thanx for all this effort, I look forward to your findings...
Hey could anyone make some new volt modded bioses for the 2900pro 1gb that have the "checksum fix" detailed right here:
http://www.xtremesystems.org/forums/...56#post2580556
Here is the stock bios:
http://www.techpowerup.com/vgabios/9...24.070809.html
Could someone do this and have 4 different versions, 1.20v, 1.25v, 1.30v and 1.35v? This would be really great because otherwise me and everybody else with an abit motherboard can't flash our bios :(
My 2X 2900PRO-XT MOD CF MODE 1000mhz gpu Test 3DMARK2006: http://expander.blogcu.com/
nice one expander how you getting the 1.4 volt everyone seems stuck at 1.35volt
this topic mostly pertains to abit users, and how when hex editing the bios of our 2900xt's we get no video output. the root of this problem is that the file checksum changes. i.e. a unmodified, true bios file checksum would have 0xD200 (when checked with atiflash -cf filename.bin) after modding it the checksum becomes 0xD201. i took the easy route and changed my clock values with the quantumforce 2000xtbios tool then opened a hex editor. i looked for data that could be expendable (pick below, look to the right and ive changed some text that i will never ever ever see) and changed its values until the checksum
matched the genuine bios. (kept going back and forth between hex editor and atiflash -cf, though there are hex editors that can give checksum) when they did match, i flashed my 2nd card and viola! i get device id info, product name etc... just as if i flashed with a legit bios. so then i flashed my 1st card with the same bios and crossed my fingers then rebooted. I HAVE VIDEO W00T! bios' took and all is running well. hope you guys understand my babbling and pass on the word. here is a sc of what i did in the hex, the top window is the origional and the bottom is modified. look to the right to see what "expendable data" im talking about to get a good checksum some garbage about how you are a noob and you didnt connect the power cables
http://i48.photobucket.com/albums/f2...76/hexedit.jpg
apparently only abit users need to go this extra step. im sure there is a more elegant solution based on what i did but whatever, it worked for me!
here is the bios, i believe its a 870/990 bios with 1.25 volts 512MB. took the origional from techpowerup BIOS database and is the Hynix 1.1 club3d bios (i made about 50 different ones and im a stoner with no real good labeling system)
at fan locked in at 100% i barely hit 73c with stock hsf
this really really works and wont brick your card
i use an abit ip-35 pro w/ 2 2900pro/xt bios in cf. i tested on 2nd card first to see if i got the blank info or not. blank info = no video for abit
Which bios has better performance, the Pro ot XT...?
Can I flash my XT with a Pro bios..?
I think the BIOS has tighter mem timings. I flashed mine, but my mem was no longer stable at the same speeds that it's stable at today. Even if it's faster clock for clock, I figured it would be a wash when you figure in that it won't scale as high. You can give it a try if you want, however... I saw no ill effects from doing so. You'll just have to let the drivers re-initialize since your PC will think you changed graphics cards.
*borat voice* GREAT SUCCESS!!
This has been said twice now but there is a fix for abit users! Once you do the volt mods to the bios in the hex editor, you then have to change some values so that the checksum (using the command "atitool -cf filename.bin") of the volt modded bios is the same as the checksum of the stock bios. The checksum of the stock 2900Pro 1GB bios is 0x7000.
All I changed to make the checksums match were some letters in the warning about something not being connected that is coded in the bios (very close to the top).
I volt modded the bios to 1.25v in 3D mode. Here it is if you want to use it:
http://www.mediafire.com/?0ldd0gdjxjn
EDIT:
Oh yeah, forgot to mention, I tested it (using it now) and it works great!
hello guys..im new to this forum..im using Abit AW9D-MAX mobo and need to do some extra step to my modded bios..now after chechsum bot original n mod bios, what should i do next?? im still confuse here:confused:
Attachment 67982
atlast..both checksums are equal.. :clap: , but the sentence "YOU HAVE NOT ..bla bla bla" looks so terrible
All I had to do was modify three letters in the word connected. Just add a bunch of Z's, and check your checksum, it should be higher than you need. Then remove Z's and to tweak, take one of the remaining Z's and experiment with letters earlier in the alphabet.
EDIT:
Oh here's a great freeware hex editor:
http://www.chmaas.handshake.de/delph...vi32/xvi32.htm
That is the one I used, it works great.
where he got this bios tool from ?
http://www.iax-tech.com/video/3800biosmod/01.htm
The program's icon would seem to indicate an AMD tool...
(as you probably saw)
At first I thought those iax tech ones were done manually.
So I moded the shroud covering my HD2900XT's yesterday. I took a dremil and cut a rectangular hole from just behind the 1st crossfire link all the up to were the curvature ends for the fan shroud--exposing the two heatpipes on the heat sink. I then placed a 120mm fan right in fornt of the opening and I also have a case fan blowing inwards as well.
Previously @ 1.2V I could barely get 840/1150 stable and the core temp maxed out @ 84 degrees while playing CoD4. Now I am at 860/1000 @ 1.25V and the core temp maxed out @ 82 degrees playing CoD4 for an hour. I was also able to pass multiple3 loops of 3DMark05/06 w/o any freezes.
I have not tried to max out 1.25V yet but I will try 880 later on this weekend.
Just thought I'd share.
why overdrive cannot be use in crossfire.?
If someone can check my moded bios for HIS2900pro, my mobo is abit ip35-e and i have several times flashed card and blacked out my pro.:rolleyes:
Thanks, i post results some day
about us abit users and our checksum fixing.
ive figured out the math behind it, its rather simple actually.
#1 there are numbers and letters in order from least to greatest is 0-9 then A-F (representing 10, 11, 12, 13, 14, 15) then it loops back to 0
#2 when this numbering system is taken into account you can compare the checksums to see what the difference (#) between a modified and unmodified bios checkums... i.e. (just did this 1 in 1 try) unmodified bios is 0xD200 and the modified bios is 0xD1D1.. thus the checksum numbers are ordered as follows... 0xD200 > 0xD1D1.
so to find the difference between them (an actual numerical value) you can count/calculate it. for example the difference between 0xD1D1 and 0xD1D2 = +1, 0xD1D3= +2... 0xD1DF= +14... 0xD1E0= +15... 0xD200 = 47.
so the numerical difference between 0xD1D1 and 0xD200 is 47
47 converted to hex is 2F
so what do we do? we insert the calculated checksum difference in hex (2F) in 2 00's in the no power cord message to get matching checksums.
finally, no more guesswork! :up:
I just check my newest editetd bios and everything looks like fine but checkrum give error.
im dont just understand.... :shrug:
Still one trap: while clocks and powerstates are inverted, the checksum isnīt!
@finramona
for a Pro Bios checksum must be 08B00
Bios works but crashing 3dmark06 second test. Temps: Load max 85*C 1.3V 840/900.
I have runned this card 24/7 820/910 whitout problem.(orginal voltage)
Highest clock what i never seen is: 870/1020 1.275V to atitool: 3dmark06 run all test, but lots of artifacts.
I think change back to xp and OC whit atitool.
Hi All, recently flashed my Pro to XT has been working fine but im lost in these threds and dont know what to do. Can someone help me decide?
1-Should i go back to pro and use ATI Overdrive?
2-Should i go back to a modded pro bios?
3-do nothing
4-Should i flash with a modded XT bios?
What diferrence does the mem or/and core volt do when played with?
If i'm suggested to use a modded pro bios,i would need a link for it :)
Thanks
It's your decision clearly..
Speaking for myself;
I want to play Crysis at reasonable framerates (>50fps) on a lcd 1680 x 1050. To achieve this I have to OC core to about 900Mhz. To be able to do this vcore must be about 1.30V. I have the cooling to make this possible. Do you?
(no need på crank up the clock/voltage if playing pac-man :D )
This is just messed up. I have NOTHING at the info fields after putting atiflash -p -f 0 name.bin. And if i hit enter i get dead card and gotta blindflash it to life...
Whats wrong here? I tried like 10 different bios from here, non of them work.
If you have a Abit motherboard - read this thread a few pages back.
Nah, i have DFI infinity P965.
Praimm
try a:atiflash -f -p 0 name.rom
I somehow agree with Guz that it is not tangible or significant improvement in the fps when you overclock the GPU.
Must be something to do with the timings of the memory because I cannot feel the games running faster with my naked eyes
For sure the GPU runs hotter with the new bios (currently at 830/950), which confirms the increased speed in the GPU.
Can somebody post results pre and post bios mod? No 3Dmarks please
could someone help me modified this bios to 1.25v and 1.3v 850/920 just perfect. i'm using Abit X38 mobo and never success to make the correct checksum, always black screen after reboot :(
thanks....
I ran the World in Conflict benchmark and I did not see any improvement in framerates with my card overclocked, in fact, gameplay was more jerky w/ my GPU OC'd.
Benchmark test was run @ 1920x1200 w/ settings on high w/ the exception of World Distance set at medium.
850/1000/1.25V: 32/14/73
840/1000/1.25V: 32/14/73
820/1050/1.20V: 33/14/86
800/1100/1.20V: 34/12/88
780/1050/1.20V: 33/15/84 <-- Stock Settings
I'm not sure how GPU bound the WiC benchmark is but this game has been a biatch to get running smoothly so I've been spending alot of time trying to get this going more smoothly. It would help if ATi could get CF running......
Thanks for the benchies TouGe
You confirmed my theory that is no improvement in running this card overclocked. The increase in speed doesn't translate in more fps just more heat and noise, but what is the real reason for this behavior? Are really the table timings affecting the performance of this card?
Can confirm that at least Crysis scales very well with higher clock on GPU.
31 fps --> 34 fps = 10%
743Mhz --> 820 Mhz = 10%
I seldom see games respond to OC as well as this.
To compare (my results):
743 core gives 40-42 in Crysis
900 core gives 50-55 in Crysis.
Settings:
x6800 @ 3,5
Crysis: 1680 x 1050, everything at 'Medium', No AA.
Regards
Sounds good and all but at least in my case i cannot get the cards stable past 850 on the core. Increasing vgpu does completely nill to the setup's stability. Furthermore some games get artefacts past a certain overclock. Also heat is not on issue since both cards are watercooled. I guess for me a ten percent increase is not really worth it.
hi guys i'm am not able to modify the hex code so i prey if you will make for me this bios mod for my Sapphire 2900pro 1GB
Gpu 850@1.25v better if 1.275
Gddr4 1000@1.7v better if 1.75 (i would take 1200mhz or 1100 with agressive timings)
at stock voltage (1.1v) my 2900 get stable 850/1050 in game and bench 880/1100 max.
Thanks in advanced
Looks like DFI board are affect by the checksum mismatch aswell, atleast my LP P35 is. I don't know much anything about hex but I sorta understand what needs to be done to fix the checksum. But when I look at my modded bios (which is only raised volts to 1.3v) the area where everyone is making the corrections is already fine the way it is.
So where else can I make the correction?:confused:
EDIT FIXED: I figure it out, just played with a few different letters in the word "CONNECTED" till I got the checksum I was looking for.
http://img510.imageshack.us/img510/3683/hexbiosfp2.png
http://img510.imageshack.us/img510/3...8aabb3fec2.jpg
if you fix the checksum does it function??
when i flashed modified bios with quantum force without fixing checksum i had black screen .... so i tried to reflash the original but nothing to do!!:mad:
i resolved flashing the orginal XT bios and this is strange because it has a different checksum of 2900pro bios.
So i have a little panic to reflash the original bios but maybe if i try ones of techpowerup maybe it can work well.
In these forum i have noticed that a memeber have attached a 2900pro bios modified @1.25v with fixed checksum. Can i flash it if i have now the original XT bios with different checksum?
Thanks:)
Triccio, I am not 100% sure but I think each card has a different checksum in their bios or at least most are different...so flashing your card with bioses from techpowerup or wherever might not solve your problem unless these bioses have the checksum you need.:)
i can't explain to myself how it can be possible do a correct flash from pro to xt orginal bios if the pro bios has cheksum 0x700 and xt bios 0xC00.:rolleyes:
Also in the case checksum are different but flashing works.:shrug:
Maybe both checksum are accepted because 2900pro doesn't differ from XT excepted for frequencies.:shakes:
If i do the bios mod on a different motherboard (ex. Asus) can i resolve the problem?
The 1gb pro is 0x700. The 512mb pro is different. I made a checksum corrected 1.25 vgpu bios for the 2900pro 1gb earlier in this thread, here is the link:
http://www.mediafire.com/?0ldd0gdjxjn
And, the math behind the checksum has been cracked:
Okay, I've something interesting to share and was wondering if others could help explain this to me.
All my previous clocking on this were done with the Quantum editor using my stock BIOS and I've had a heck of a time getting good results from my OCing. Well, yesterday I decided to modify my BIOS using a Hex editor and took steps to correct the checksum as well. Now everything works great and I am now stable in 3DMark05/06 firefly test (which use to lock up @ 850MHz) and I am also getting better results in CF using WiC benchmark.
My current clocks are 850/900/1.25V. I ran WiC @ 1920x1200 w/ everything on high and AA/AF disabled.
Avg: 46
Min: 22
Max: 140
Can anyone explain why I'm getting much better results? Could the invalid checksum have caused conflicts with CF and Catalyst drivers? I can't think of any other reason why I am problem free at these clocks. I am sooooo happy right now.
Final question. What are the upper limits in regards to core/VRM temps for the HD2900XT? Is there a white paper out there some where? Right now my temps are GPU1/2: 87/85 VRM: 80/77 while running 7 consecutive benchmarks in WiC.
Thanks guys......
hi there, is there any1 with modded bios for sapphire 2900pro 512mb gddr3 256bit? after install of 7.12 cat my rivatuner oc is useless cause it hold the oc via rivatuner but when runing 3d mark 06 , in last 2 test cards not OCed like had to be 770/1100 but only for stock 600/800 for 3d.
ok and here we go, i readed all blahblah about bios editing and tried my doing i found there is frequencies on many places in the bios so i am deep in sh...
also this card has 1V 2d and 1.08V 3d which hold my core on 770mhz...
can any1 advice how to find which numbers are the correct one if they r on many places? cause all normal tools which edit 2900xt bioses are unable to work for my card as it uses pcb from 2900gt i think, cause its 256bit, only one 8pin conector for power... my 2d is 506/513 and 3d 600/800... seting 3d voltage to 1.2-1.25V can boost my oc well i think if there is no danger in power circuits as it been designed for lower power draw...
any advice welcome...
http://img222.imageshack.us/my.php?image=ocge3.jpg
Welcome to the forum :)
Post your bios here, If it's similar to the 512bits bios it's easy to mod it.
Have you tried the Foxconn-tool yet?
Regrads.
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 ;)
Thanks - will have a look at it.
Tried this tool?
http://rapidshare.com/files/71500253...IOS_Editor.zip
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.
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/
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.
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!)
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?
Hey guys I have a HIS 2900XT all im looking to do is change the voltage a tad bit, i have a few bios's but im running an abit board. I saw there were extra steps to take, if anyone is willing to help me out, maybe even create the file for me could you pm or post in here?
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
@ZeRo4u
If you had taken the time to actually read mossad's post you would have noticed that he owns a 2900GT.
actualy 2900 gt PCB with R600 320 stream core , which is super imba hybrid, now i can say, card has only 1 8pin, so there must be only 1 6pin conetor to have overdrive in CCC disabled, then all bios modifications are visible, if there is 8pin CCC overdrive bios settings... so roger, your table works great ;)
now i am on 0.9V 2d 399/405 and 1.15V 3d 750/950 instead of 1V 506/513 2d and 1.08V 600/800 3d... 750/950 couse it was max stable with 1.08v, now i got tested that 800/1000 is stable, 830/1000 isnt, but now i got only stock cooler so there is not so many room to oc and i am happy with what i got ...
anyone else having problems with catalyst 7.12 and modded bios in cf? i had to downgrade back to 7.11 because i get a black screen with the new drivers
i see a bunch of 1.25 volt bios'... but i could swear that mine stock is 1.15... raising up to 1.2 yeilds 860/999 100% stable on both cards
mabye i just got 2 good samples iduno.
With the modded BIOS and the new 7.12 drivers my card won't go into 3d mode; it just stays at 2d clocks and voltages. Just installing the driver without CCC doesn't help. I'm looking for a solution, but haven't found one as of yet.
Anyone else with issues?
im having issues with the 7.12 drivers as well. i dont have time to come up with a fix at the moment as im busy trying to get my q6600 to 4ghz:up:
mabye in a few days ill post back with a fix if i can get it working.
Guys, need some help on this one, my 2900 pro/xt is temporary out of action.
Did a bios edit (as many times before) and tried to edit the 2D voltage from 1.00 to 0.850. (Yes, I did it the right way)
Got an error (which I don't remember). After reboot it was silence and darkness.
Well, no problem, I'll just do a blindflash. Well, this did not work - cause there is no sign of pc booting (no beeps, no nothing).
Any ideas, before I get myself a cheap PCI card? Thanks.
borrow one from your little sister?:yepp:
http://service.futuremark.com/compare?3dm06=4414800
any good guys? this is after 1 full day of tweaking on the new mobo
Well guys I have been modding my card ( HD2900XT) with several Bios's and have even made my own custom one from 1.2volts to 3.5 volts from stock speeds to 900/1000 and after 14 hours of this I thought I found the sweet spot as it had the highest benchmark and totaly stable ...so life is good....NO!!!! I thought for a joke I would try the New 7.12 driver and use the overdrive to see just how far I left it in the dust......Guess what it benched 5 (only 5) marks higher...what the hell!!!!:horse:
Conclusion: Some how they are modding drivers without doing all the stuff like voltages and so on. There seems to be much more benefit to customizing the drivers than the bios period....hard to believe and I wouldn't have untill now.:eek:
So flash your PRO to XT and use ATI Overdrive for a simple but effective O/C:up:
Totaly blew me away!!!:toast:
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 ^^
Ok checksum is now 0BD00 but could somebody check does these mods kill my 2900 pro :D?
That is modified 2900 XT bios where i've changed device ids and bios version infos to pros :cool: Just in hope than with modded XT bios i get better OC :D
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 ^^
i have a 2900xt by asus, stalker version, on a msi k9a2-cf board running visat 32bit. and i simply want to have my volts raised from 1.2 in 3d to 1.35. my card is fully watercooled and modded to cool even better. my load temps are 40c, so im not scared of heat issues. and i can OC just fine using amdgpuclocktool, as it saves the 3d settings as it goes between 2d/3d but it has no voltage control, and ati tool dosnt work for crap for me, i just use to monitor things. my current limit is about 860/999, and i never get artifacts, just lockups when i push it to hard.
ive read everything in this thread and many of the threads you guys have linked and im just looking for a very small change, and the rest ill change on my own. i just want to know whats the safest way to increase my volts and how i should go about doing it,