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Forcing dual GPU's to run at full speed (GTX 260)

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Jason00:
Okay guys I've got a good question for you. How do I force both GPU's to run at full 3D speed? I've already used Rivatuner and what I thought would enable both GPU's to run at full speed only gets one to run at that speed. I have my GPU's setup for SLI in the NVIDIA control panel.




MB – Asus Rampage 2 Extreme
CPU – Intel Core i7 920 CPU @  w/Apogee GTZ WB
MB – Asus Rampage II Extreme4
RAM – OCZ Platinum 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666)
VGA – SLI – EVGA GeForce GTX 260 Core 216 896MB 448-bit GDDR3 w/D-Tek FuZion GFX 2 & UNI-Sink Heatskink
PSU – Corsair HX1000 Power Supply
HDD – Raid 0 – Western Digital Cavier Black 500GB 7,200 32MB
WATER COOLING – x2 MRC320 Radiators, Swiftech MCP655 Pump, 8 Scythe SY1225SL12SH 120mm "Slipstream" Fans
OTHERS – 1 WD Black 1TB HD, 2 DVD Burners, & 1 Flash card reader

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Raistmer:
SLI should be disabled for CUDA AFAIK

sunu:

--- Quote from: Raistmer on 01 Jan 2010, 01:54:25 pm ---SLI should be disabled for CUDA AFAIK

--- End quote ---
Supposedly starting from 2.3 (or was it 2.2?), cuda is capable of using two GPUs separately even when they are linked with SLI.

As for Jason's question, http://lunatics.kwsn.net/12-gpu-crunching/gtx-295-downclocking.0.html could be a start.

Jason00:
So far I changed the setting in the NVIDIA Control Panel and restarted the computer. So far it seems to work.

n0xlf:
My GTX280s always downclock if I leave them in SLI...Starts off okay for a few WUs and then I can't get the clocks back without a reboot...

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