corsair cx600 and what do you mean with specs?
The wattage and power on the +12 volt rail. But that's okay, your power supply seems to be sufficient.
Are you playing games on Steam?
In any event, it wouldn't hurt to reinstall your drivers by doing a complete clean install. That means uninstalling everything Nvidia the old fashioned way, through the Windows Control Panel Add/Remove Programs. Then select the "Clean Install" option when installing the new drivers.