unlocked HD3850 512mb bios

[MsB]

MsB, tried my stock HIS HD3850 IceQ 3 Turbo bios stock is 715/909 and out of the box i am running 2x of these in CF a 783/1100

Bios http://fileshosts.com/videocards/HIS...iceq3_bios.rar

I get an error that says subsystem mismatch with win lfash and I cant get this P35 to boot to usb stick

[Bo_Fox]

I get an error that says subsystem mismatch with win lfash and I cant get this P35 to boot to usb stick

Just make sure USB legacy is enabled in your P35 bios. You might have to play around with some boot settings.. most mobos should support it as long as the first boot device is set to "Removable" and make sure that all other devices are disabled.. I dunno for sure.

[Eldonko]

USB drive shows up as a HD on P35. Set USB drive as HD 1 and set HD as boot prio 1.

[Greg_1]

I can't get over 850MHz on gpu, I'm using Gecube HD3850 512 OC Edition.
850MHz everything is fine but over it sys crashes ???

[saaya]

with or without mod?
without a mod i can only get 860 stable...

EDIT: my bad! 760 is the max stable without a mod for me!

[Thoth36]

I can't get over 850MHz on gpu, I'm using Gecube HD3850 512 OC Edition.
850MHz everything is fine but over it sys crashes ???

I am in the same situation, the difference is that I have a Powercolor HD3850 512 PCS.
I can play crysis or COD4 for hours at 850Mhz but if I pass 860 I get a system lock.
I made the pencil mod (vgpu=1.38v), so what is limiting my overclock is the bios.
Does anyone have a bios that is unlocked for this card?

[Greg_1]

@saaya, with mod, without I could get only 750

@Thoth36 after updating gfx bios I don't have that problem any more, now I can get 890MHz but it is unstable on my current V

[saaya]

@saaya, with mod, without I could get only 750

@Thoth36 after updating gfx bios I don't have that problem any more, now I can get 890MHz but it is unstable on my current V

yeah my bad, it was a typo
what bios are you using now?

[ken]

with or without mod?
without a mod i can only get 860 stable...

EDIT: my bad! 760 is the max stable without a mod for me!

did my bios work or you had to hardmod it?

[Greg_1]

yeah my bad, it was a typo
what bios are you using now?

I'm using bios ver 010.073.000.001, my old bios was 010.067.000.000 I think

[saaya]

did my bios work or you had to hardmod it?

im in my hometown and didnt have time to try your bios before i came here, sorry ill be back in the south in a few days and will give it a try then

[saaya]

I'm using bios ver 010.073.000.001, my old bios was 010.067.000.000 I think

hmmm could you post the bios with the 860mhz fix here?

[Thoth36]

I've been unable of finding a unlocked bios for my Powercolor HD3850 PCS 512 mb (qimonda).

BIOS: http://uploadline.com/dline/722975/1...monda.v070.rom

If someone can fix the 860Mhz limit, or direct me to a place where I can download an unlocked one, I would be very grateful.

[Greg_1]

Here you go
It's from GeCube 3850 512 X-Turbo III, works fine above 860, enjoy.

[Thoth36]

Here you go
It's from GeCube 3850 512 X-Turbo III, works fine above 860, enjoy.

Thanks Greg_1, I tried that bios, and apparently it does not lock the system above 860, but I had to reinstall the drivers (not a problem).
Now I'm gonna have to check the voltages, because it was very stable at 850Mhz (1.38v) and when I tried it above 870Mhz crysis crashed to desktop (maybe need more voltage).

Edit:
Bumped the gpu voltage (pencil mod) to 1.46v (3D), and now it's stable at 918Mhz.

[Kinshou Kuma]

Long time lurker
seldom poster, in dire need of help.
I have two sapphire 3850 512mb cards. I cannot find a bios that works for the life of me. Everything is either subsystem IDs do not match or cannot find Vbios image file. I am using ati winflash, because I have flashed my 3870 with it so many times I think the card no longer knows what it is :/

I am looking to unlock it. By the way ATI overdrive limits these cards to 720 pretty low compare to others. Anyhoot my stock bios is attached if anyone can help out.

[motox]

If you own an HIS turbo 512 card and havent checked the type of vram, you'll be glad to know its Samsung. Number on the chip reads SAMSUNG 743 K4J52324QE-BJ1A. All i know about that chip is that its very close to 1.0ns by comparing it with other model numbers... havent found any info on them.

Any easy way to tell voltage on vram? Im sure default 3850 volts would be quite limited... OCing to a stable 2000mhz on default vram volts is impressive, but I cant wait for volt tweaking software!

[saaya]

Kinshou Kuma, winflash didnt work for me either... i used atiflash and forced the files to work. thx for the bios greg! ill give that a try as well, hope it works on my card even though i have samsung and not quimonda mem

[Thoth36]

I didnt get atiwinflash to work the traditional way either.
I tried a work around and it worked. What I did was:

I opened a cmd window (in vista - right mouse click - open as administrator)
Then I navigated (in the cmd window) to the folder where I previously put atiwinflash and the bios file (ex: D:\atiwinflash).
Then typed: atiwinflash -f -p 0 XXXX.rom (where XXXX.rom is the name of the bios file)
Pressed enter, waited a couple of seconds and I received a popup confirming the flash, and asking for a reboot.

[Greg_1]

In my case winflash worked just fine in the traditional way

[Kinshou Kuma]

Winflash worked for my 3870 but not these 3850s. I will try the above the above method and post back

[Kinshou Kuma]

now am getting file not found but I see the file in the folder

Does it have to the bios for another sapphire 3850 512mb ?

[zuelber]

I have a Powercolor HD3850 512MB xtreme and looks like my card does not have a 2d mode. I tried flashing it to a newer PC bios 070 (mine come with 067) also tried a Gecube 073 bios but Rivatunner/ati ccc or Gpu-Z 0.15 don't show a 2d mode, it's always at 3d clocks. Both times i flashed with atiwinflash and i didn't had to reinstall drivers, it only asked to restart.
Another weird thing is i can't overclock with Rivatuner, when i hit the "apply" button it just revert to the default 3d clock...
Can anyone help me on this?

thx in advance

ps: sry if its in the wrong place

[Thoth36]

now am getting file not found but I see the file in the folder

Did you type the bios name correctly?
Did you navigated, in the cmd window to the folder where atiwinflash and the bios file is?
This is what I did:
First I decompressed atiwinflash 2.0.0.2a (that includes atiwinflash.exe plus a bunch of other files most of them dlls) to G:\bios 3850\winflash.
Then I copied the bios file to that folder.
Then opened a cmd window

Does it have to the bios for another sapphire 3850 512mb ?

If you have a sapphire 3850 512mb, that is locked bios ver. 010.070 or previous, and if you can find a bios file for that card that is newer, go with it.
If you cant, then you can try a bios from another brand, but it may not work and in that case you have to be prepared for a blind flash or having to insert a pci card to reflash your 3850.

In my case I flashed my powercolor hd3850 pcs 512 with the gecube one that Greg_1 posted above and it worked.

[Thoth36]

I have a Powercolor HD3850 512MB xtreme and looks like my card does not have a 2d mode. I tried flashing it to a newer PC bios 070 (mine come with 067) also tried a Gecube 073 bios but Rivatunner/ati ccc or Gpu-Z 0.15 don't show a 2d mode, it's always at 3d clocks. Both times i flashed with atiwinflash and i didn't had to reinstall drivers, it only asked to restart.
Another weird thing is i can't overclock with Rivatuner, when i hit the "apply" button it just revert to the default 3d clock...

You can modify your bios to change the 2D settings:



This is one that I modified previously to downclock the 2D clock to 300Mhz and the 2D voltage to 1.014v

Above the original bios and below the modified one.



You must also know how to covert dec to hex (simple using the windows calculator in scientific mode)

_BIOS______HEX_____DEC
30 75 00 = 00 75 30 = 30000 = 300 Mhz
40 19 01 = 01 19 40 = 72000 = 720 Mhz

BE 04 = 04 BE = 1,214 Volt
F6 03 = 03 F6 =1,014 Volt

PS: This is what I understood from reading, I am not a specialist. Those are the changes I did and I didnt have problems.