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

[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]

SLI should be disabled for CUDA AFAIK

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...