Re: Video Card Problem?
No experience with Thermaltake beyond the 600 watt in my server at home, but I do have a couple of Antecs and we use them at work too, and they're solid.
+1 for that PSU tester. We have the clear version of it, and it's amazing.
The issue here can also be related to heat if it won't turn on soon after it shuts off. Test the PSU, or better yet, buy or borrow another one and see if the issue goes away first. That is usually the easiest. Then if necessary, we can look into other problems.