Overclocking an 8800GT

Oberon · 14 Jun 2008 at 19:19

Hi,

I've had an 8800GT now for 6 months and I want to overclock it.

What's a good core, memory and shader overclock on an 8800GT?

Thanks!

MiNxYyY · 14 Jun 2008 at 19:31

its generally down to the card,some will overclock more,some will overclock less

Wedge · 15 Jun 2008 at 09:29

First off download http://www.techpowerup.com/gpuz/ and check out your stock settings.

Second, is it still fitted with the stock cooler?

My 2 MSi 8800GT's run all day at 680/1000/1750 http://www.btinternet.com/~wedge007/crysisdemo.jpg

Both fitted with S1 coolers.

Im sure if your brave enough 700/1000+/1750+ is do able.

1kiwi · 15 Jun 2008 at 13:28

Mine run as below with the stock BFG cooler. Get rivatuner and start clocking

EDIT: I only run the below settings when playing games. I use the rivatuner launcher to swap between modes.

Rroff · 15 Jun 2008 at 17:47

Use ATITool to give you an idea of the maxes - then drop it back a bit from where it starts to artifact - finally make sure its stable for atleast 10 minutes in ATITool... then run it through 3D Marks 06 a few times.

If you have a "cheapy" 8800GT some don't even hit 675MHz core... however on average you should hit around 700/1800 with the memory at about 1000 - good ones will do about 740-760 core with 1900 or so shader clock and 1100 (2200) on the memory.

Pilky01 · 15 Jun 2008 at 18:00

Mines at 725 core 1000 memory 1800 shaders

All on stock cooler

C64 · 16 Jun 2008 at 11:50

700 core
1750 shader
900 memory
I get little gains above these clocks so mines been flashed to that since I got it last year.
On s1 cooler.

pugheaven · 16 Jun 2008 at 13:05

My 2x8800GT's run at 700/1850/2100 all day everyday, with stock cooling and dont' seem to go above 65C flat out and with over 2 hours of playing GRID yesterday... mine are BFG ones...

Cheers Pug

Wedge · 16 Jun 2008 at 18:57

C64 said:
700 core
1750 shader
900 memory
I get little gains above these clocks so mines been flashed to that since I got it last year.
On s1 cooler.

hey there, did you flash your gt's your self? if so can you please tell me how?

cus my 2 have different bios's and id like them to have the same

ive tried to find a decent guide....but failed

C64 · 16 Jun 2008 at 20:58

) Created a bootable floppy using this, just run in windows with floppy in drive: Bootable Floppy Maker or the main site bootdisk.com

2) Download and run this, .nvFlash 5.57 from here mvtech page for nvFlash 5.57, it unzips to two files. Run the nvFlash.v5.57.exe file and it unzips again. Drag files (cwsdpmi.exe, nvflash.exe) from the last unzip directory onto floppy

3) Reboot PC with floppy in drive, set floppy as first boot device in BIOS. The A:\ prompt shows up.
You will type: "nvflash --save orig.rom" (that's a double dash, and the file name orig.rom is your original video bios being saved)

4) Eject the floppy and reboot into windows. Re-insert floppy and copy orig.rom to somewhere you can find it later.

5) Download and install NiBiTor 3.6 from here mvtech NiBiTor 3.6 page

6) Run NiBiTor, got to menu File>Open BIOS and select your orig.rom. Navigate to the 'Voltages' tab, then 'Exact Mode' tab. In the drop-down for 'Extra' select 1.1V.

7) Got to menu File>Save BIOS and create a new name like voltmod.rom. Exit NiBiTor and copy your voltmod.rom to the floppy.

8) Reboot PC with floppy inserted and you're back to A:\. Type "nvflash voltmod.rom" . It will ask you if you're sure, so make up your mind and type Y if you are sure. When it's done eject the floppy and reboot.

this is a softmod voltage increase guide but you set clocks in the same way i set my voltage to 1.1 and clocks using this method.

Wedge · 16 Jun 2008 at 23:51

C64 said:
) Created a bootable floppy using this, just run in windows with floppy in drive: Bootable Floppy Maker or the main site bootdisk.com

2) Download and run this, .nvFlash 5.57 from here mvtech page for nvFlash 5.57, it unzips to two files. Run the nvFlash.v5.57.exe file and it unzips again. Drag files (cwsdpmi.exe, nvflash.exe) from the last unzip directory onto floppy

3) Reboot PC with floppy in drive, set floppy as first boot device in BIOS. The A:\ prompt shows up.
You will type: "nvflash --save orig.rom" (that's a double dash, and the file name orig.rom is your original video bios being saved)

4) Eject the floppy and reboot into windows. Re-insert floppy and copy orig.rom to somewhere you can find it later.

5) Download and install NiBiTor 3.6 from here mvtech NiBiTor 3.6 page

6) Run NiBiTor, got to menu File>Open BIOS and select your orig.rom. Navigate to the 'Voltages' tab, then 'Exact Mode' tab. In the drop-down for 'Extra' select 1.1V.

7) Got to menu File>Save BIOS and create a new name like voltmod.rom. Exit NiBiTor and copy your voltmod.rom to the floppy.

8) Reboot PC with floppy inserted and you're back to A:\. Type "nvflash voltmod.rom" . It will ask you if you're sure, so make up your mind and type Y if you are sure. When it's done eject the floppy and reboot.

this is a softmod voltage increase guide but you set clocks in the same way i set my voltage to 1.1 and clocks using this method.

Wow thanks, as ive said i have my GT's in SLi, will this process automatically flash both cards?

Or would i have to take one out and do them one at a time? (to get them to the latest bios)

::edit:: dont worry i sussed it