3850 and 3870 moded bios

3850 still clock lock



http://www.iax-tech.com/video/3800biosmod/3850light.jpg


http://www.iax-tech.com/video/3800bi...3850crysis.jpg


http://www.iax-tech.com/video/3800bi...503dmark06.jpg





3870 is unlock bios


http://www.iax-tech.com/video/3800biosmod/3870light.jpg


http://www.iax-tech.com/video/3800bi...3870crysis.jpg


http://www.iax-tech.com/video/3800bi...703dmark06.jpg



i have few bios in here to download

HD3850
770/975
760/950

HD3870
875/1250
860/1200
830/1200

(UVD clock overclock too)

also the overclock range for 3870 to up to 1500 / 1400 :D

http://www.iax-tech.com/video/3800biosmod/03.htm

Thanks, just what I need. :up:

Works with all 3850/3870 videocards ?

did you up the volts of the gpu/mem, or just up the clocks....?

it works for all 3850/3870

voltage doesn't change

wow cool.

im definitly seriously considering the 3850 for ultimate bang for the buck performance. especially since the 3870 is like $50-70 bucks for expensive

nice 770mhz!! 100mhz overclock from stock 670mhz.


so the core clock is still locked u say?

Quote:

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Originally Posted by tbone8ty

wow cool.

im definitly seriously considering the 3850 for ultimate bang for the buck performance. especially since the 3870 is like $50-70 bucks for expensive

nice 770mhz!! 100mhz overclock from stock 670mhz.


so the core clock is still locked u say?

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the max clock before lock up is ~785 i think. cuz 4 of my cards have problem once set on 790mhz. i believe 90% of 3850 no problem to do 770/975 on 24/7.

It's the time to sell my 2900XT.:eek:

nice..... now if we can get some voltage modded bios that work well, we'll be in there.

Quote:

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Originally Posted by HousERaT

nice..... now if we can get some voltage modded bios that work well, we'll be in there.

---

also 3850 unlock bios :D

hmm... why is this needed?

is anyone currently looking at changing the voltage in the bios so we can hit higher clocks? there should obviously be more headroom on a 3870 than a 2900xt that i have, but unless we can bump voltage to actually overclock further than a 2900xt goes then theres little to no point changing cards except to deal with a little less heat and power usage.

I have my 3850@ 802 right now with no problems so far, are you sure that their are problems at 785:confused:

Quote:

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Originally Posted by guess2098

also 3850 unlock bios :D

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What about the 3850 with 512 meg?

I can only get this high with no problems

http://img221.imageshack.us/img221/7940/3850eq3.jpg

Ok, so I just got my Powercolour 3850 pro 256mb. Ran a few tests and max overclock is 750/2000. Would flashing with this bios hold any perforformanne increase...?

I have the powercolor hd 3850 and max stable clock using atitool for me is also 750/2000 (749.25/1998 to be exact). I wonder if its a BIOS issue?

Also, do these BIOSes disable powerplay?

Tried the modded bios, but getting higher temps with no added performance, just using stock...

Can someone edit my default bios so that its runs at 3D clock of 725/1800 please

Quote:

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Originally Posted by ghost101

I have the powercolor hd 3850 and max stable clock using atitool for me is also 750/2000 (749.25/1998 to be exact). I wonder if its a BIOS issue?

Also, do these BIOSes disable powerplay?

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Pretty sure all the Powercolor's are locked at 750. All the reviews I have read have suggested so, which is a shame. Completely unlocked, the Powercolor 512mb 3850s would be amazing value for money.

Quote:

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Originally Posted by roadie

Pretty sure all the Powercolor's are locked at 750. All the reviews I have read have suggested so, which is a shame. Completely unlocked, the Powercolor 512mb 3850s would be amazing value for money.

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Im not too sure. A BIOS cant cause artifacting can it? The card doesnt lock up at above 750 but artifacts instead in atitool. CCC itself doesnt detect a problem at 770.

<--- 3850 stuck at 860mhz no matter the volts...:mad: :mad: :mad:

Quote:

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Originally Posted by JamesBong420

<--- 3850 stuck at 860mhz no matter the volts...:mad: :mad: :mad:

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with the modified bios ?

Quote:

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Originally Posted by fhpchris

What about the 3850 with 512 meg?

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I guess the HD3870 bios could work there. It might upp the voltages to HD3870 levels and also gives you HD3870 overcloks. Would be nice if it works :)

Quote:

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Originally Posted by Astennu

I guess the HD3870 bios could work there. It might upp the voltages to HD3870 levels and also gives you HD3870 overcloks. Would be nice if it works :)

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ddr4 bios for ddr3 card :rolleyes: :rolleyes:

Owh yeah forgoth bout that one :D

maybe the bios of this card then:

http://www.fudzilla.com/images/stori...iceq3_card.jpg

HiS IceQ @ 735-980 512 MB :)

yup with the 770975.sb bios im stuck at 860 no matter the volts i went up to 1.49v and still no go 1.4 v i can do 850..

How do you up the voltage on the 3850, I can't find any tutorials for that mod

No way to make a bios with modded vgpu values?
I'd like to have one at 1.5V.

Thank you,
bye

Quote:

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Originally Posted by KainXS

How do you up the voltage on the 3850, I can't find any tutorials for that mod

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the hardmod is the same as the 3870.

i need help:(

i have just got myself a 3870 and no matter what i cannot get passed the 860 wall,
The BIOS's i have used are from techpower up and from here http://www.iax-tech.com/video/3800biosmod/03.htm
They all flash fine but i cannot get passed that 865 wall, but this screen shot makes things sooo much more confusing, do i trust CCC or ati tool ?

I'd do a hard mod for voltages but i dont thing it'll help.
http://img260.imageshack.us/img260/8370/3780coreit2.jpg

Would i need to get the volt mod done to get passed this stage? if so its not a problem for me :D

Try the unlocked bios mate ;) and then Vmod :D Or do these bioses have a 864mhz unlock?
http://www.xtremesystems.org/forums/...d.php?t=166334

I had a club3d card that would not even go past 850 850 is bearly stable. The other 2 cards run 850-1200 fine.

subscribed

Sincere thanks to the OP for helping my card kick some serious azz on air. :D

Set to 890/1404 in Riva

http://service.futuremark.com/compare?3dm06=4114880

http://img256.imageshack.us/img256/4...043dm06ec2.jpg

I was thinking my cards were pretty good with 930/1340 but yours :eek: 1404Mhz on mem is really kick ass for a stock card (I assume it's with stock voltages) :shocked:

Bye
p€p|n0r@ng

The visiontek 3850 i have wont go any higher than 773 (769 in gpu-z) without artifacting. I had assumed it was a power issue, but maybe it is a bios issue?

Quote:

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Originally Posted by guess2098

3850 still clock lock



http://www.iax-tech.com/video/3800biosmod/3850light.jpg


http://www.iax-tech.com/video/3800bi...3850crysis.jpg


http://www.iax-tech.com/video/3800bi...503dmark06.jpg





3870 is unlock bios


http://www.iax-tech.com/video/3800biosmod/3870light.jpg


http://www.iax-tech.com/video/3800bi...3870crysis.jpg


http://www.iax-tech.com/video/3800bi...703dmark06.jpg



i have few bios in here to download

HD3850
770/975
760/950

HD3870
875/1250
860/1200
830/1200

(UVD clock overclock too)

also the overclock range for 3870 to up to 1500 / 1400 :D

http://www.iax-tech.com/video/3800biosmod/03.htm

---

OK I have a HUGE question...I have been trying to figure this out =/
I started editing my own bios's for this card (yours work fine for me)
Im doing vgpu settings edited into the BIOS in addition to your stuff...
I have a 3850 256MB...all my bios's even if I edit my stock one WILL NOT get my card to boot up =(
Im thinking this happens cuz the BIOS needs its own correct some sort of checksum value...
I looked at your 2 3850 BIOS and they work great...I did a hex comparison in them to each other and of course found the OC section you changed settings on....
But I saw 2 other areas one was bigger where the code was different. They were in same locations and Im tryin to figure if its these locations that need to be changed so the modded bios will work? are these the checksum values or something????
Anyways, will you please tell me HOW to change these areas appropriate to the settings I specificy in clocks / voltages so it will properly work on my card like yours do?
Thanks..

works great I have flashed 830/1200 to test now I can easily get higher core clocks

nice work!!!
my card in crossfire!!
http://img206.imageshack.us/img206/1299/29852ro7.jpg
i send one private mail to you for the new bios 950/1300!!
thanks!!

My cards seems to work fine with the 830/1200 bios
http://img267.imageshack.us/my.php?image=atibioswj2.jpg

Quote:

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Originally Posted by spl

nice work!!!
my card in crossfire!!
xxxxxx
i send one private mail to you for the new bios 950/1300!!
thanks!!

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what's your mobo:confused: great fsb you got.. dq6 sucks after 490 fsb:D

Great clocks SN!

I can bench (3d mark 2006) 920/1290 [both card] with this bios stock cooling but my e6600 lowers my sweet points

any unlocked bios for the 3850's ? i have one sapphire and whatever Vgpu i'am using i can't pass 869Mhz :(

yeahp head on over to my thread for the 3850 256MB custom bios's Ive been editing the unlocked version of bios for several people now...
http://www.xtremesystems.org/forums/...d.php?t=169778

v71 unlocked bios attached...stock clocks 1.333v VGPU

thanks man :)

@ guess2098 Thank you very much for the great work you have put into you Bios for these Cards :) The Bios are excellent and work fantastic .

Thank you ......Campbell;)

Is there an unlocked bios for the 512MB 3850's? All the posts I see seem to be for the 256 version. Thanks

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 )

http://i31.tinypic.com/351ihw6.jpg

http://i27.tinypic.com/11ad8b9.jpg

Quote:

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Originally Posted by Barr3l Rid3r

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 )

---

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.

Quote:

---

Originally Posted by Barr3l Rid3r

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 )

---

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?

Quote:

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Originally Posted by lowtcell

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.

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

Quote:

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Originally Posted by roadie

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?

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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

Quote:

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Originally Posted by Barr3l Rid3r

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

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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.

Quote:

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Originally Posted by lowtcell

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.

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

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

Quote:

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Originally Posted by 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

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

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.

Does anyone know if there&#180;s any biosmods for 3870 cards with DDR3 ??

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

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.:)

Quote:

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Originally Posted by 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&#37;.Help will b appreciated.:)

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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 :)

Quote:

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Originally Posted by Barr3l Rid3r

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.

Quote:

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Originally Posted by JMKS

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.

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