3850 and 3870 moded bios

[Barr3l Rid3r]

Careful, Sapphire Bios 71 has no auto fan control. I had to go to HIS Turbo X Bios to get the fan to work without Riva Tuner.

Haven't seen any problem w/ the fan on it, by the way His has Samsung memory and mine has qimonda...

[Barr3l Rid3r]

Great, I too have the Ultra Durable GDDR3 version of the Gigabyte 3870 (GV-RX387512H) and was looking for a solution to raise the low stock voltage and to get over the clock lock. Currently, my card is at 850/1025Mhz (855/1031Mhz) with the stock BIOS. Any higher on the RAM and I can see yellow artefacts in ATI Tool's Artefact Finder, although these are not detected. Overdrive in CCC gives a blank screen with the core at or above 865Mhz.

Is there no solution to modify the stock BIOS to get higher voltage and to remove the clock lock?

I couldn't find any... original bios is locked... u can save it using Winflash and edit to raise voltage, but it will be sticky at 860Mhz.

Sapphire use the same qimonda memory so u shouldn't have any problem, here is running smoooth

[lowtcell]

Haven't seen any problem w/ the fan on it, by the way His has Samsung memory and mine has qimonda...

Doesn't Sapphire also have Quimoda? I don't have any trouble running HIS bios on mine, but if you have no fan issues then I guess it does not really matter.

[Barr3l Rid3r]

Doesn't Sapphire also have Quimoda? I don't have any trouble running HIS bios on mine, but if you have no fan issues then I guess it does not really matter.

Saaphire has.. but His got Samsung chips....

[dpa]

one thing..

the 875/1250 bios file is a .sb file.

do I need to rename it to 8751250.bin or will it work as 8751250.sb ?

regards,

Haakon

[lowtcell]

one thing..

the 875/1250 bios file is a .sb file.

do I need to rename it to 8751250.bin or will it work as 8751250.sb ?

regards,

Haakon

You shouldn't need to rename, but it will be just fine if you do and you can use .ROM as extension.

[Mungri]

Cool, I have to try volt modding mine too. I'll have to wait untill tomorrow.

I have a triplex with samsung chips that does 801/1177 fully artifact free, and max stable with artifacts is 801/1285.

Is the bios modding easy? The last time I bios modded was when I had SLI 6800's. Stock speeds were 325/600, max stable was 425/900!!! So I modded them to 400/800.

Time for more fun XD.

[ante_ante]

Does anyone know if there´s any biosmods for 3870 cards with DDR3 ??

[OnDborder]

Is there a bios for anything above 877gpu, for a HIS 3870?
I've tried 885 and it seems to be locked at 877.

[gforceuser]

I have a Gecube 3850 256mb and it crosses 100C as the fan is locked at a lower speed and have to use riva tuner.
I want automatic Variable fan speed BIOS or atleast a BIOS that can make it run at 65%.Help will b appreciated.

[chris.y2k.r1]

I have a Gecube 3850 256mb and it crosses 100C as the fan is locked at a lower speed and have to use riva tuner.
I want automatic Variable fan speed BIOS or atleast a BIOS that can make it run at 65%.Help will b appreciated.

Buy a fan controller and cram the connector into one of the FC's headers. It works. Over time you might fry the fan controller's resistors so by a cheap one. I've done that both of my 3870x2 and it works great. The only thing (like I said) is that these fans are not electrically equally to a standard case fan so it might bork the FC over time but so far, so good with mine

[JMKS]

Ok I've found a solution for Gigabyte HD3870 512MB DDR3 Qimonda....
Original Ver 70 locked bios 1.22V

at 859/2100Mhz

Used a Sapphire 3850 512MB DDR3 Qimonda Bios
Ver 71 Unlocked Bios 1.22V ( http://www.techpowerup.com/vgabios/2...12.071108.html )

+ Editor to set 1.22V 2D and 1.32V 3D And now I got 1.38V in Multimeter
@895/2100Mhz

( http://www.computerbase.de/downloads...tor/?url=17592 )

Can it be possible to flash that BIOS to Asus EAH3850 with Glaciator [picture here: http://www.xtremesystems.org/forums/...&postcount=813]? Pencil mod is working, and I reached @ 1,38V that 862MHz core wall.
Flashing with ATI WinFlash is not possible, because of different part numbers or something like this. Should I force-flash it from DOS? My BIOS is 64kb large while that Sapphire BIOS is 61kb, but PCB is AFAIK the same.

[Barr3l Rid3r]

Can it be possible to flash that BIOS to Asus EAH3850 with Glaciator [picture here: http://www.xtremesystems.org/forums/...&postcount=813]? Pencil mod is working, and I reached @ 1,38V that 862MHz core wall.
Flashing with ATI WinFlash is not possible, because of different part numbers or something like this. Should I force-flash it from DOS? My BIOS is 64kb large while that Sapphire BIOS is 61kb, but PCB is AFAIK the same.

Exactly, use sapphire 71 bios, aTiflash -f -p 0 biosname.bin