if you are using driver version 93.71, coolbits will have problems sometimes.
do a google of "z tweaked nvidia drivers" and the latest version works fine with coolbits.
if your video display is screwed up, slow the card down.
bad display=bad overclock (or bad card, hopefully not).
also, in the nvidia control panel... make sure you have the "advanced" setting selected. i think it's on the "view" tab.
that drove me crazy until i finally figured out that was why the overclock info didn't appear.
it's likely this is your problem. it should be one of the two.
"nagasama no longer drinks tecate, or streaks out of the night for anything, and he has a fine wife so he has no use for your girlfriend...she is safe..."