Sli GTX275 overclock problem

[Slinkie]

Hi Folks,

I am putting my new set up through it's paces and am currently overclocking my graphics cards.

My current settings are

core:730 , shader:1555, memory:1250

for both cards.

I haven't stopped pushing them yet however one problem I have is with the shader. As soon as I push it up anymore and run 3dmark06 I get an error and a bubble message saying that an error occured with my drivers and they have had to be restarted.

Is this a problem with the my drivers or have I just found the limit for the shader? My current drivers are 190.38, am running vista home premium and the rest of my spec is

i7 920 @ 4.1
6gm corsair ram
asus P6T deluxe
corsair 850w PSU
2 x BFG Gtx275 OC cards.

I am currently at 24500 3dmarks with these settings, it'd be a shame not to go for 25k

 

[peahead]

Have you tried some different drivers.

 

[Slinkie]

I think these are the latest official release so I don't want to try rolling back. I just wanted to see if anyone else has the same issue as me.

 

[ChrisLandin]

What 275's are you using bud??

 

[peahead]

Hi

From looking at reviews of gtx 275 id say you have hit the wall with the shader clocks.There is a review of a bfg 275 gtx oc at guru3d.com and they got the shader to 1535 and also said typically on gtx 275s you get around the 1500 on the shader.

 

[Slinkie]

I don't mind hitting the wall, it just seemed a bit lower than how high I can push the memory/ core.

The cards are both BFG gtx275 OC cards

 

[jigger]

The shader and core speed are linked. If you run them out of kilter things can start to get slower.

You need more voltage and/or better cooling.