8800 shader clock tweaking

Marshy · 19 Apr 2007 at 23:00

Hi guys , Anyone done any experimenting tweaking the shader clock speed on an 8800 & if so was it worthwhile?. Got a bit board & decided to have a play modding the bios on my EVGA 8800GTS Superclocked & having never played with the shader clocks before was wondering whether to tweak it or leave it.
Currently got it quite happy at 650core 2000mem & shader up to 1500mhz from default 1400.

Anyone been there & broken anything by overdoing the shader clock ???

For the record I'm using Nibitor to mod the bios so can set individual clocks for core, memory & shader.

Ta

Marshy · 20 Apr 2007 at 18:28

Guess I'm the Guinea pig then

titaniumx3 · 20 Apr 2007 at 18:30

Any benchmarks showing the 100mhz difference?

jaykay · 20 Apr 2007 at 18:31

i would like to the shader clocks increase as well as i havent seen any about

fornowagain · 20 Apr 2007 at 18:41

On the subject

http://www.xtremesystems.org/forums/showthread.php?t=124872

As long as the original is backed up, I flashed an x1900xtx and got stuck once, managed to flash the original back with a PCI card.

Kezmo · 20 Apr 2007 at 18:51

Flashed my card the other wknd with a modded bios, u can flash a backup bios with no display if u get a bad flash by blind typing nvflash -5 -6 backup.rom and spamming y a few times

Marshy is your card on water and whats your temps like ? may flash mine again with higher clocks

BruceLee · 20 Apr 2007 at 20:09

I asked this question in a different thread but never got answered.

From my small amount of research overclocking the core increases the shaders aswell, not sure at which ratio though.

It does show improvements in 3dmark scores etc, so I guess its worth doing.

EDIT

Am I right in thinking that all GTS cards have the same memory type/speed and core? I assume its the same across both 320mb and 640mb cards?

Currently got mine running happily at 600 core and 900 memory after 5 minutes of overclocking, seems stable, think I got to 640 core when I had problems in ATiTool. Is it worth pushing more on the memory or is it not worth it?

willhub · 20 Apr 2007 at 20:12

Kezmo said:
Flashed my card the other wknd with a modded bios, u can flash a backup bios with no display if u get a bad flash by blind typing nvflash -5 -6 backup.rom and spamming y a few times

Marshy is your card on water and whats your temps like ? may flash mine again with higher clocks

So when the bios flash went wrong, you typed nvflash -5 -6 backup.rom and it was all fixed? How you know when to type nvflash -5 -6 backup.rom?

BruceLee · 20 Apr 2007 at 20:13

willhub said:
So when the bios flash went wrong, you typed nvflash -5 -6 backup.rom and it was all fixed? How you know when to type nvflash -5 -6 backup.rom?

I assume if its like other DOS based flash apps you just type this in to the command line and it does the rest, so even if you screw it up you can blind flash by just retyping the command in.

willhub · 20 Apr 2007 at 20:15

BruceLee said:
I assume if its like other DOS based flash apps you just type this in to the command line and it does the rest, so even if you screw it up you can blind flash by just retyping the command in.

Ah so with the floppy disk or w/e in, you just wait for abit to be sure the cmd has loaded? or do you need ot press a key when you see the actual floppy led on?

Is it possible to use CD's? I would hate to have to go searching to find my FDD.

BruceLee · 20 Apr 2007 at 20:18

Yeah pretty much, from what I remember when I flashed my 9500 Pro years ago its just a case of booting up with the floppy, run the command, this runs the flash app, 15 seconds later it should be finished and back to prompt, then reboot.

Pretty sure you can make a CD from it, although its a bit of a waste for <1mb of data.

willhub · 20 Apr 2007 at 20:26

BruceLee said:
Yeah pretty much, from what I remember when I flashed my 9500 Pro years ago its just a case of booting up with the floppy, run the command, this runs the flash app, 15 seconds later it should be finished and back to prompt, then reboot.

Pretty sure you can make a CD from it, although its a bit of a waste for <1mb of data.

I havent had a floppy drive in my pc for 2.5 yr now lol but I found one in my old PC.

fornowagain · 20 Apr 2007 at 20:28

willhub said:
I havent had a floppy drive in my pc for 2.5 yr now lol but I found one in my old PC.

Ah, but you got a disk?

willhub · 20 Apr 2007 at 20:30

fornowagain said:
Ah, but you got a disk?

Uh, I forgot about those

Kezmo · 20 Apr 2007 at 20:35

willhub said:
So when the bios flash went wrong, you typed nvflash -5 -6 backup.rom and it was all fixed? How you know when to type nvflash -5 -6 backup.rom?

Not had a bad bios flash for a few years
Youve backed your old bios up on the disk with new bios and floppy is 1st boot device, so if u get a bad flash just leave floppy in drive, reboot, once the disc has stopped u know dos is loaded and u type blind nvflash -5 -6 and backup rom name

willhub · 20 Apr 2007 at 20:40

Kezmo said:
Not had a bad bios flash for a few years
Youve backed your old bios up on the disk with new bios and floppy is 1st boot device, so if u get a bad flash just leave floppy in drive, reboot, once the disc has stopped u know dos is loaded and u type blind nvflash -5 -6 and backup rom name

Will this work with a CD rewritable or DVD rewritable? as I wont be using a floppy as I have no floppy disks.

Marshy · 20 Apr 2007 at 22:30

I'm going to have a proper play & do some benching over the weekend so i'll keep you informed of my findings, I've backed the core & mem down a tad as after a hour of C&C3 there was an odd flash here & there of a bad texture.

Ronaldo · 21 Apr 2007 at 10:36

i'v clocked my shader to 1450 from 1300, only 100 marks extra on 3dmark06 and didnt notice any increase in fps in the games i play, but i'm thinking new maybe DX10 games will take advantage of it.

Oh i modded the original bios then flashed it

Firegod · 21 Apr 2007 at 11:27

Marshy said:
I'm going to have a proper play & do some benching over the weekend so i'll keep you informed of my findings, I've backed the core & mem down a tad as after a hour of C&C3 there was an odd flash here & there of a bad texture.

Try changing the paste on the card with some AS5 instead, should help keep the temp down and let you run the higher speeds. May as well if your fiddling with everything else.

The Asgard · 21 Apr 2007 at 12:54

Firegod said:
Try changing the paste on the card with some AS5 instead, should help keep the temp down and let you run the higher speeds. May as well if your fiddling with everything else.

Didn't make much difference if any when I tried and certainly not worth loosing your warranty.