346.16 overvoltage not available on GTX570HD

I installed the latest beta & set “CoolBits” “16” in the device section of xorg.conf, but allowable voltage offset range was still 0 to 0. Is the card not supported?

Do you have access to other settings?

Have you tried with:

Section "Device"
        Identifier      "Default Nvidia Device"
        Option          "Coolbits"  "16"

With “CoolBits” “8” or “CoolBits” “24” powermizer works and without them powermizer doesn’t, so I think xorg.conf probably works fine for setting CoolBits options.