I wasn't sure where to post my plea
so I am trying here too.
I have had a 630i for 2 years and all fine until it now randomly screen freezes and goes black and I have to reboot to get back in again (hold reset button for required amount of seconds) and all is fine again until next time.
I've played WoW since beta and recently L4D and it can go a day without crashing and then out of the blue this happens at any time regardless of what is happening ingame.
I downloaded the latest driver which was the 196.21 version to enable me to play L4D and did this from the Nvidia site. This is the only difference. I have since installed a previous version 195.62 to see if this could be the reason.
As you have probably gathered I am a noob when it comes to this and would appreciate any ideas on what could be causing it.