ATI 38xx BIOS editor (Finally!)

[SRV]

That's bad because Riva Tuner sets clocks for 2D and 3D all together. ATiTool doesn't work (yet) with HD38x0, ATiTrayTools also...

[fornowagain]

I think Overdrive is disabled if the checksum is incorrect. From what I have read the BIOS editor doesn't correct the checksum.

That's possible, I does say its corrected the checksum though.

[lowtcell]

Same here, Overdrive didn't work when I modified BIOS. I have Club3D HD3850 256MB, with reference cooler.

Hmmm, I flashed with Vcore set to 1,327 but I can't get GPU stable at more than 750MHz. At default Vcore (1.21V) I get 730MHz stable. So it's just 20MHz. I doubt actual Vcore is 1.327V, and now I see it's just 1.24V? That explains why I got just 20MHz and why the temperature stayed almost the same.

I saw some of you entered value manually, but that doesn't work for me.

OT:
A question for lowtcell: how did you get a limit of 900MHz for GPU in CCC?

I used HIS IceQ3 Turbo bios edited with the editor app. If you look at the screen cap of GPU-Z, you see it reports the card as a HIS now (my card is Sapphire). I only raised Vcore to 1.241 and CCC still works with that. All other Bios I tried either killed CCC or left max OC @ 720.

[lowtcell]

I think Overdrive is disabled if the checksum is incorrect. From what I have read the BIOS editor doesn't correct the checksum.

Well, it worked for me. Checksum is the same on original and modified Bios.

Here's the Bios file I started with.

[SRV]

Thanks for reply.

Too bad because I have Club3D with 256MB memory, so it would be impossible to use that HIS bios. :/

[mason17]

Thanks for reply.

Too bad because I have Club3D with 256MB memory, so it would be impossible to use that HIS bios. :/

It´s not impossible...
When you start the bios editor and load HIS bios you have an option to choose the amount of memory on your card, so it can adjust the modified bios to the VGA.
So far that only happens with HIS bios.

[lowtcell]

It´s not impossible...
When you start the bios editor and load HIS bios you have an option to choose the amount of memory on your card, so it can adjust the modified bios to the VGA.
So far that only happens with HIS bios.

Wow, you beat my reply by 3 minutes. I was going to post the same answer.

[thepfy]

Once you have modified the BIOS the checksum should change unless the editor is clever enough to modify some non important part of the BIOS (e.g. display text) to set it so the checksum stored in the BIOS matches the BIOS checksum.

[SRV]

It´s not impossible...
When you start the bios editor and load HIS bios you have an option to choose the amount of memory on your card, so it can adjust the modified bios to the VGA.
So far that only happens with HIS bios.

Wow, you beat my reply by 3 minutes. I was going to post the same answer.

That's pretty kewl.

Once you have modified the BIOS the checksum should change unless the editor is clever enough to modify some non important part of the BIOS (e.g. display text) to set it so the checksum stored in the BIOS matches the BIOS checksum.

I'm sorry, but I barely understand that checksum thing. What does it mean? TIA.

[lowtcell]

Once you have modified the BIOS the checksum should change unless the editor is clever enough to modify some non important part of the BIOS (e.g. display text) to set it so the checksum stored in the BIOS matches the BIOS checksum.

Well, all I can say is, the Bios editor app does a checksum correction at the end, and the checksum on original and new files are the same (7500)

I'm sorry, but I barely understand that checksum thing. What does it mean? TIA.

Basicaly, a checksum is a hex value that is used to verify the validity of a file. If you change content of a file (in this case the voltage values inside the bios file), the checksum of a new file will be different from the original. So now, you have to modify unneeded information in the file to make checksum equal. Most people change the text from the warning message built in to the bios that instructs you to plug in your power cable to accomplish this.

I hope that makes sense, I did my best to try to explain

[SRV]

Well, all I can say is, the Bios editor app does a checksum correction at the end, and the checksum on original and new files are the same (7500)

Basicaly, a checksum is a hex value that is used to verify the validity of a file. If you change content of a file (in this case the voltage values inside the bios file), the checksum of a new file will be different from the original. So now, you have to modify unneeded information in the file to make checksum equal. Most people change the text from the warning message built in to the bios that instructs you to plug in your power cable to accomplish this.

I hope that makes sense, I did my best to try to explain

Oh, now I see. Thanks for explanation.

EDIT: Sorry if I am boring , is it perfectly safe if I apply this HIS bios on reference 3850 card? Memory is afaik Samsung 1.1ns. Does this match? And I don't know what PCB design that HIS card has, is it also reference? Thanks in advance!

[oc_junkY]

How have you flashed your HD3870X2?
AtiWinFlash doesn't load for me, it just puts my CPU under stress and makes my mouse laggy. (Hidden stress test? )
I have read the bios files with GPU-Z, but i'm afraid of flashing before i know how it at least _should_ work.

[lowtcell]

Oh, now I see. Thanks for explanation.

EDIT: Sorry if I am boring , is it perfectly safe if I apply this HIS bios on reference 3850 card? Memory is afaik Samsung 1.1ns. Does this match? And I don't know what PCB design that HIS card has, is it also reference? Thanks in advance!

According to this post http://www.xtremesystems.org/forums/...5&postcount=54 HIS uses Samsung memory chips. My Sapphire has Quimoda but Bios from HIS works just fine. As far as cooling, the HIS Bios fixed my fan problems. Original Bios did not turn on the fan until temps hit 90c, now I never get over 72c under hours of heavy gaming. My card is single slot design.

[SRV]

Wow, that's very encouraging! PCB design is same, and I have Samsung chips just like HIS, so there should be no problems. It's also good to hear that fan control works better than in original bios.

But my memory can't higher than 950MHz (1900MHz), so I will have to set clocks a bit lower than 736/982...

Thanks, again.

[SRV]

I tried flashing with that HIS bios, but I get error, something like "ID subsystem does not match". I also tried some other bioses, but size is not the same, so I didn't flashed them. AFAIK size has to be the exactly the same.

In the end I will stay with original bios, with clocks set to 730/950MHz, good enough for me.

[leffe]

I got the same subsystem id error when I was trying to flash my Sapphire 3870 with a new bios. And about those bios sizes, there seems to be ~61kb and ~65kb sizes for 3870. My originals were 61 but I force flashed with a 65kb and it worked. I am using Crossfire so it was easy to test on the slave card . Don't do it though if you don't have a backup plan on how to recover.

[psilos]

How have you flashed your HD3870X2?
AtiWinFlash doesn't load for me, it just puts my CPU under stress and makes my mouse laggy. (Hidden stress test? )
I have read the bios files with GPU-Z, but i'm afraid of flashing before i know how it at least _should_ work.

does anyone do something like that..??

the amd gpu clock tool crashes from some Mhz of mem...

it has a bug.

[dj.oxa]

works great

[Jon Boy Deluxe]

How many people have done their X2's? Someone mind taking a few screenies and throwing up a few words of advice?

I've only ever flashed single die nvidia gpu's so I'm a little unsure what tools to use/process.

Any help appreciated.

[Jon Boy Deluxe]

How have you flashed your HD3870X2?
AtiWinFlash doesn't load for me, it just puts my CPU under stress and makes my mouse laggy. (Hidden stress test? )
I have read the bios files with GPU-Z, but i'm afraid of flashing before i know how it at least _should_ work.

I have this problem too

Edit: I scrapped using atiwinflash.
I made a bootable usb stick like this and just put atiflash and the modded bioses on and did it in dos...

[Mungri]

The bios editor wont open for me, it says 'component ARProgBar.ocx or one of its dependencies is not correctly registered: a file is missing or invalid'

[jimmyz]

opens in vista 32bit but not in xp with my 3870 x2 installed. with 3850's it worked in either.

[MajkY]

would this work for 3650 series ?

[dj.oxa]

The bios editor wont open for me, it says 'component ARProgBar.ocx or one of its dependencies is not correctly registered: a file is missing or invalid'

click several times
they l open

[Viilutaja]

Hy guys!
I have a question.

I have Gigabytes HD 3850 512mb Ultra Durable 2 version card. I have locked 0.68 bios, and max bench stable clocks are 805/1020. By bench stable i mean, that all over those clocks (especially memory) i will get some driver errors during Mark06, when i OC the core over 805 mhz, the screen just locks up, no artys or anything else. Temp is fine, it never goes over 67C. So i take the courage to blame locked bios here, that core just locks up.
Gigabyte has Hynix 1.4 ns memory chips. Is it OK to flash with some unlocked bios, from a card that has different ns on memorys, like 1 or less? I know that the manufacturer can be different, reading through this thread and it works, but how about the ns? Thanks so much!