I have two GTX280 cards running under XP64, latest drivers (195.62_desktop_winxp_64bit_english_whql.exe), CUDA 2.3.
For some reason, Core/Memory/Shader clocks are not reduced from 602/1107/1296 Mhz to 300/100/600 Mhz when the card is idle. Right after the boot primary display card (monitor is connected to it) drops clocks to 300/100/600 but the other card keeps running at 602/1107/1296 regardless the fact that it has no work to do (SLI is not active, second monitor is off).
After the CUDA-related software run (for example, any sample from CUDA SDK) both cards start to work at full clocks until next reboot (or for a very long time, tens of minutes, I don’t know exactly). This problem is rather annoying as the system eats extra power as well as produce extra heat and noise when it is not necessary. Are there any ways to fix it ?
Thanks in advance.