Gigabyte HD3870 MOd Unlocked | 900/2100Mhz AiR cooled

[Barr3l Rid3r]

Ok I've found a solution for Gigabyte HD3870 512MB DDR3 Qimonda.... System setup

VGA Gigabyte HD3870 512MB DDR3 Ultra-Durable vGPU + CoolerMod AiR
Default 780/1900Mhz @ 1000/2150Mhz
Intel 975xbx BadAxe 417Mhz fsb
Core2 Duo 6600 @ 3.8GHz Single
2x 2GB (4GB) Corsair 667Mhz @ 700Mhz

1 - Original Ver 70 locked bios 1.22V @ 1.34v 3D

maxed out at @859/2100Mhz (11800 Marks 3D06)

2 - 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 1.32V 3D And now I got 1.38V in Multimeter
@895/2100Mhz (12200 Marks 3D06)
( http://www.computerbase.de/downloads...tor/?url=17592 )

Original





Moded









3 - @1000Mhz/2150Mhz - 1.66v Unlocked Sapphire Bios - (13261 Marks 3D06)
http://service.futuremark.com/compare?3dm06=5333029

[Clint]

Exellent news!

Can you please help out and scribble down the name and spec's of a couple components on your card for me?
I intend to replace those components that are different on my Gigabyte 3850 from your 3870 (not mems ofcourse).

I have marked out those components on attached picture:


Thanks!

[Barr3l Rid3r]

Exellent news!

Can you please help out and scribble down the name and spec's of a couple components on your card for me?
I intend to replace those components that are different on my Gigabyte 3850 from your 3870 (not mems ofcourse).

I have marked out those components on attached picture:


Thanks!

It wont change much, first of all this fix should not work for u as u have hynix memory, and for last the voltage is changed by a SMD resistor in the back of the card, not by capacitors... but u can get a small increment maybe.

After work I will check it

[Clint]

It wont change much, first of all this fix should not work for u as u have hynix memory, and for last the voltage is changed by a SMD resistor in the back of the card, not by capacitors... but u can get a small increment maybe.

After work I will check it

I'm aware of the Hynix memory, and the SMD is probably the same on both cards.
Voltage command is given from bios btw, and that can be modded.
The bigger capacitor will allow for more power delivered, and I prefer to go with the design Gigabyte has decided.

Anyway, I'm grateful if you could just open the side panel and scribble down those values for me...it would really be helpful

[Barr3l Rid3r]

I'm aware of the Hynix memory, and the SMD is probably the same on both cards.
Voltage command is given from bios btw, and that can be modded.
The bigger capacitor will allow for more power delivered, and I prefer to go with the design Gigabyte has decided.

Anyway, I'm grateful if you could just open the side panel and scribble down those values for me...it would really be helpful

how much MHz could u reach already?

Your card has a locked bios, and for a while there is no way to pass 860Mhz wall, since ther is no unlocked bios for hynix 1.4ns yet... but if your best attempt is way lower then 860Mhz then u can get some extra performance increasing voltage in your original bios using the editor...

I'm telling that cause I coudn't get any extra Mhz increasing VGPU from 1.3V to 1.38V using original bios cause my limiting factor was the locked bios, I could reach 860Mhz before.

[Clint]

As of today I've reached 780MHz on the GPU unmodded.
I will do a combination of both my own bios and a hardmod.

Now, could you please look at those values for me, they are written on the capacitors that are marked with red squares in the picture I posted.

[roadie]

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 )

Have you cooled any of the voltage components on the card? I will definitely try this mod when I get an Accelero S1 rev 2 and will make sure to cool everything I can.

Is 900Mhz the upper limit of what you can achieve with the stock cooler? Do you think you could go higher with a better one?

I am going to email Gigabyte to see if they can release an unlocked BIOS for the card so we can OC without voiding the warranty. Hopefully, they will work on it, as they have released an 8800GT with overvolting capabilities etc.

[Clint]

As of today I've reached 780MHz on the GPU unmodded.
I will do a combination of both my own bios and a hardmod.

Now, could you please look at those values for me, they are written on the capacitors that are marked with red squares in the picture I posted.

@ Barr3l Rid3r

Any success on opening the sidepanel and scribble down the values for me?
Should not be to much work involved in that

[dinos22]

what the heck
3870 card with 3850 bios LOL

great work mate

must have been a little unnerving when you initially flashed hey heheheh

[ceemic]

Barr3l Rid3r, did You use ATiWinFlash or ATiFlash w/ floppy?

[Clint]

Barr3l Rid3r, did You use ATiWinFlash or ATiFlash w/ floppy?

Use ATiFlash w/ bootable USB stick instead.

[ceemic]

Does 3850's mem have the same timings as 3870? I mean, do 3850 and 3870 perform the same on same clock?

[Barr3l Rid3r]

Use ATiFlash w/ bootable USB stick instead.

How to do it? I mean, to made a celular bootable?

[Barr3l Rid3r]

Does 3850's mem have the same timings as 3870? I mean, do 3850 and 3870 perform the same on same clock?

haven't seen much difference but I know that the extra clock make it works... now I hust want to use CCC further then 720Mhz... Any idea?

[Barr3l Rid3r]

Have you cooled any of the voltage components on the card? I will definitely try this mod when I get an Accelero S1 rev 2 and will make sure to cool everything I can.

Is 900Mhz the upper limit of what you can achieve with the stock cooler? Do you think you could go higher with a better one?

I am going to email Gigabyte to see if they can release an unlocked BIOS for the card so we can OC without voiding the warranty. Hopefully, they will work on it, as they have released an 8800GT with overvolting capabilities etc.

That was the top to reach using pencilmod at 1.42V I'm going to harmod it now..


I definately want this bios if u can get it!

[ceemic]

I flashed my 3870 w/ 3850 BIOS, edited clock to 780/950 and I got now 1,339V in 2D and 1,381V in 3D
Previous values: http://ceemic.pri.ee/hardware/hd3870/hd3870_13_1.jpg

[ceemic]

It works
http://ceemic.pri.ee/c2d/904-1017.jpg haven't searched max clocks yet, still @zalman's crap in a 21C ambient room...

One thing is strange: http://ceemic.pri.ee/c2d/3870def.jpg
Real clocks are correct, set by BIOS 780/950, but GPU-Z and ATiTool shows def 670/830. When I click "Default" on ATiTool, then clocks drop to 670/830, but after bootup they are again 780/950

[Barr3l Rid3r]

Sweet, new coolermod gives me an extra 25Mhz now I've reach 925/2150Mhz w/ 12850 in 3DMark06 Core2 Duo...

[ceemic]

coolermod?

[Barr3l Rid3r]

coolermod?

changed, see first post...

[ante_ante]

Can i use this bios on my powercolor HD3870 512MB?

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

[ceemic]

Turbodream, if your card has 1.0ns Qimonda DDR3's, then yes.

You have also the stupid max clock limit?

[ante_ante]

Yes, a limit at 891mhz at max. Need more volt

[Barr3l Rid3r]

Yes, a limit at 891mhz at max. Need more volt

So u are not limited by bios (bios is limited on 862Mhz), no need to change it, just add mor volts.

[Barr3l Rid3r]

Ok I've found a solution for Gigabyte HD3870 512MB DDR3 Qimonda.... System setup

VGA Gigabyte HD3870 512MB DDR3 Ultra-Durable vGPU + CoolerMod AiR
Default 780/1900Mhz @ 1000/2150Mhz
Intel 975xbx BadAxe 417Mhz fsb
Core2 Duo 6600 @ 3.8GHz Single
2x 2GB (4GB) Corsair 667Mhz @ 700Mhz

1 - Original Ver 70 locked bios 1.22V @ 1.34v 3D

maxed out at @859/2100Mhz (11800 Marks 3D06)

2 - 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 1.32V 3D And now I got 1.38V in Multimeter
@895/2100Mhz (12200 Marks 3D06)
( http://www.computerbase.de/downloads...tor/?url=17592 )

Original





Moded









3 - @1000Mhz/2150Mhz - 1.66v Unlocked Sapphire Bios - (13261 Marks 3D06)
http://service.futuremark.com/compare?3dm06=5333029

UPDATE