Vmod 3850 through BIOS apparently IS possible....

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01-31-2008, 10:33 PM
maxmaz

Ok folks, I think our HexEdit and checksum correction days are finally over. I came across this thread (german anyone?):

http://www.computerbase.de/forum/sho...d.php?t=372893

And here is the link to the ATI 85xx BIOS editor:
http://www.aledander.de/vb/ati_bios_...tibiosedit.zip

Change whatever frequency/voltage you want in a breeze. Could anyone test it to make sure it works? I'm a bit busy right now...

Enjoy!
02-01-2008, 01:09 AM
CapFTP

Quote:

Originally Posted by maxmaz

Ok folks, I think our HexEdit and checksum correction days are finally over. I came across this thread (german anyone?):

http://www.computerbase.de/forum/sho...d.php?t=372893

And here is the link to the ATI 85xx BIOS editor:
http://www.aledander.de/vb/ati_bios_...tibiosedit.zip

Change whatever frequency/voltage you want in a breeze. Could anyone test it to make sure it works? I'm a bit busy right now...

Enjoy!

coool......hope someone can test it...

ps. tried to open a 3870x2 file...is not allowed....i hope soon there'll be an update
02-01-2008, 06:22 AM
lowtcell

I just tried the app. Did not flash with new bios until I can confirm the checksum, etc.
I used the HIS 3850/512 bios file that I'm currently running on my Sapphire.

There is an error in the Voltage dropdown. Instead of a dot, it is a comma (1,327 and not 1.327) and saved bios file gave an error on opening. If you type the value manually, it seems to save correctly and opens the file with set values.

EDIT
Just noticed at the bottom of the app window is a checksum display. Both the stock BIOS and the modified show value of 7500 :up:

EDIT AGAIN
Just ran this on a Sapphire bios I have on here, and noticed on the bottom of window that there is a checksum correction taking place when the file is saved.

I'm not at home now, so I can't try flashing just now.
02-01-2008, 08:28 AM
chp

I tryed several bioses versions to use on my PowerColor (All working) and Connect3D (more problematic). But none of them allowed me to go further than 762Mhz event with VGPU set to 1.37V

Perhaps, depending on the manufacturer, some HD3850 VGPU can be changed within the bios others not.

Other testings: I tryed also different revisons (065, 067, 070, 071 and 073).
The one giving the best score in 3DM06 is the 073 followed by the 064 and the worst is the 071. (Testings made on PowerColor and Connect3D)

The differences sometimes are huge....
02-03-2008, 04:45 AM
KarwaPL

Quote:

Originally Posted by xoqolatl

Karwa, it'd be best if you flashed ASUS card with Sapphire's bios, it's in newer version (071) and lets you clock above 862MHz. They both use the same PCB and memory (I checked) and Sapphire bios works on ASUS (I checked, too)

Here's Sapphire bios modded to 1.327V and with 2D clocks disabled:
http://profide.eu/files/karwa.zip
I have measured power consumption before and after flashing, and disabling 2D clocks does nothing. Power consumption is still ~230-240W when cards are idle (cpu loaded).

Powodzenia z flaszowaniem :up:

Thx for your answer m8, I realy appreciate that :up: Unfortunately there is some problem with *.zip file, unable to unpack grr :mad:
02-07-2008, 03:21 PM
pablo NZ

has anyone tried the modded bios for the GeCube 512Mb 3850 OC X-Turbo? I have just ordered one and wanna see if what results others have had while waiting for it to turn up :)
02-19-2008, 06:25 AM
victorbr

1 Attachment(s)

Please, somebody mod my bios with the HD3870 voltages and correct the checksum..i can't pass 770 mhz on core :mad: ..Thanks for all :)
02-19-2008, 08:09 AM
ghost101

I have managed to reach the 857.25mhz clock limit on by 256mb powercolor hd3850 using 1.39v (1.327v via bios and the rest using a pencilmod).

Does anyone know of an unlocked 256mb hd3850 bios?

Thanks.
02-19-2008, 08:13 AM
ghost101

Quote:

Originally Posted by victorbr

Please, somebody mod my bios with the HD3870 voltages and correct the checksum..i can't pass 770 mhz on core :mad: ..Thanks for all :)

That already has a 3d voltage of 1.327v, the maximum possible via BIOS.

Ive reuploded with a checksum of 7500.
02-19-2008, 08:57 PM
lowtcell

Quote:

Originally Posted by ghost101

That already has a 3d voltage of 1.327v, the maximum possible via BIOS.

Ive reuploded with a checksum of 7500.

I tried the HIS bios with 1.327 volts. It does not work. Vcore only gets to 1.241, tested with DMM on the card at full load.
02-21-2008, 07:10 AM
Cha0s

1 Attachment(s)

this is mine Bios ,.. got the HIS 256MB

Bios Settings are : 750 - 950 @ max Voltage as the Bios settings can give.
No LOCK...
I got mine card @ 931/1026 with additional pencilmods
02-21-2008, 11:46 AM
pablo NZ

Quote:

Originally Posted by pablo NZ

has anyone tried the modded bios for the GeCube 512Mb 3850 OC X-Turbo? I have just ordered one and wanna see if what results others have had while waiting for it to turn up :)

Ok so FYI the gecube cards can't change voltage via BIOS, but pencil mod works fine. Currently running 810mhz crysis stable @ 1.38v, 67'C load temps.
02-21-2008, 11:51 AM
raibemunn

I tryed 1.327 too, but i only managed to get 1.23 in multimeter. Default is 1.214.
02-21-2008, 02:56 PM
lowtcell

Quote:

Originally Posted by Cha0s

this is mine Bios ,.. got the HIS 256MB

Bios Settings are : 750 - 950 @ max Voltage as the Bios settings can give.
No LOCK...
I got mine card @ 931/1026 with additional pencilmods

How high do the clocks go up in CCC with that Bios?
02-23-2008, 12:26 PM
ghost101

Quote:

Originally Posted by Cha0s

this is mine Bios ,.. got the HIS 256MB

Bios Settings are : 750 - 950 @ max Voltage as the Bios settings can give.
No LOCK...
I got mine card @ 931/1026 with additional pencilmods

Cheers.

edit: It also actually is only 1.3v in the BIOS. You can get 1.327v via the editor. Nevertheless, its exactly what i wanted.
02-25-2008, 06:55 AM
hzrcn

result ??
which software using for biosmode :shrug:
02-27-2008, 10:48 AM
ghost101

Quote:

Originally Posted by hzrcn

result ??
which software using for biosmode :shrug:

Yeh it worked perfectly. I used the BIOS editor to change the clocks and winflash to flash the card.

With 1.4v im running it at 871mhz for the core.
02-28-2008, 08:50 AM
hzrcn

when i press load bios...

http://img518.imageshack.us/img518/4001/adszms4.jpg
02-29-2008, 04:35 AM
raibemunn

Ive tryied 2 different unlocked bioses. And with neither of them i cant lower the 2D voltage. Ideas? :shrug:
04-11-2008, 10:37 AM
Data_

Quote:

Originally Posted by Cha0s

this is mine Bios ,.. got the HIS 256MB

Bios Settings are : 750 - 950 @ max Voltage as the Bios settings can give.
No LOCK...
I got mine card @ 931/1026 with additional pencilmods

I can't open it with techpowerup Radeon Bios Editor.
Can anyone post Sapphire HD 3850 256 MB modded bios?
06-11-2008, 12:23 PM
zaone

Does anyone have a mod for the Gecube version with 512 MB DDR3 and 668 , 1400 mhz clocks?
06-13-2008, 11:31 AM
zaone

What program can i use to read the current bios settings for my card?

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