Recently it seems my video card have been buggy.
I have a nvidia 240 GT, I even clean all the driver and reinstall them.
When i open lightroom or photoshop, my open GL or Cl (dont remember) they always crash the first time, sometime in between work it crashed and leaving my monitor blank and i have to hard shut down my computer.
To some extreme, i took off my OC on my cpu, which didnt help at all.
Since the problem is on my nvidia card, my question would be if i replace the card with a new 680 gtx or the blasphemous quadro 4k which would be more RELIABLE. Slowness dont matter much, i dont play video games, no 3d, but i work off of premiere and after fx too.
Alot of time i work with big PSB files, up to 6gb composite with 20k pixels.
Please help, this is not a good problem for me to work on client images.
my current comp i7 950, 12gb ram, ssd for os with additional disk for scratch.
It is, of course, possible that your nVidia 240 has a hardware problem
What is also possible is that the specific nVidia driver you are using is the problem, especially if you have PPro CS6 and had to update your driver for that reason
An EXAMPLE of the driver being the problem is at http://forums.adobe.com/thread/1084197
I have a GTX285 with nVidia driver 296.10 and do not have any problems
You might want to post the rest of your details, such as http://forums.adobe.com/message/4200840