- Joined
- Oct 9, 2001
- Location
- Dundalk, Ireland
Hi all.
First off, this is what I have:
2x Gainward 7900gs 265MB Golden Sample PCI-E cards in SLI
nVidia 93.71 driver.
3800+ X2 2Ghz @ 2.45Ghz.
570w SLI certified Hiper PSU
All watercooled.
This is the problem:
My cards overclock like hell individually, they won't overclock at all in SLI.
This is what i've done:
I installed one card, ran 3dMark05 at stock 450mhz core, 660mhz ram. I got 7137.
I overclocked the card to a colossal 653mhz core, 800mhz ram and got 8842
I installed the other card by itself in the other PCI-E slot and at stock got 7140, nearly exactly the same.
Again, I overclocked this card to the same 653mhz core, 800mhz ram and got 8846, nearly exactly the same.
I used Coolbits to overclock the cards.
Both with no artifacting, they run perfect.
So, I run both cards in SLI at stock speeds in 3dMark05 and I get around 9800, which isn't great, but it's still a sizeable increase over the stock 7137 of one card.
However, the cards simply won't budge at all when I try and overclock them in SLI. First I use coolbits, with no changes made to its value, nothing. I change the value of Coolbits to 1A for SLI, nothing. I use Rivatuner instead and I think I got an increase of 250 points, which is pathetic. If I go over 550Mhz, then I actually get a lower score. I installed Powerstrip, but that only lets me clock about 100mhz over stock, so i didn't bother trying; these cards do 200mhz over stock.
Both cards are PCI-E power-connected, with the bridge installed.
I am at an utter loss here, anyone have any idea? Thanks.
EDIT: Hmm, i've seen some people are having trouble with the 93.71 drivers in overclocking. I'll try switching down to a lower version.
First off, this is what I have:
2x Gainward 7900gs 265MB Golden Sample PCI-E cards in SLI
nVidia 93.71 driver.
3800+ X2 2Ghz @ 2.45Ghz.
570w SLI certified Hiper PSU
All watercooled.
This is the problem:
My cards overclock like hell individually, they won't overclock at all in SLI.
This is what i've done:
I installed one card, ran 3dMark05 at stock 450mhz core, 660mhz ram. I got 7137.
I overclocked the card to a colossal 653mhz core, 800mhz ram and got 8842
I installed the other card by itself in the other PCI-E slot and at stock got 7140, nearly exactly the same.
Again, I overclocked this card to the same 653mhz core, 800mhz ram and got 8846, nearly exactly the same.
I used Coolbits to overclock the cards.
Both with no artifacting, they run perfect.
So, I run both cards in SLI at stock speeds in 3dMark05 and I get around 9800, which isn't great, but it's still a sizeable increase over the stock 7137 of one card.
However, the cards simply won't budge at all when I try and overclock them in SLI. First I use coolbits, with no changes made to its value, nothing. I change the value of Coolbits to 1A for SLI, nothing. I use Rivatuner instead and I think I got an increase of 250 points, which is pathetic. If I go over 550Mhz, then I actually get a lower score. I installed Powerstrip, but that only lets me clock about 100mhz over stock, so i didn't bother trying; these cards do 200mhz over stock.
Both cards are PCI-E power-connected, with the bridge installed.
I am at an utter loss here, anyone have any idea? Thanks.
EDIT: Hmm, i've seen some people are having trouble with the 93.71 drivers in overclocking. I'll try switching down to a lower version.
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