I have a nVidia GeForce ti 4400 that works, until it has been on for a minute, then green lines (reminiscent of those vertical lines in Nintendo games from the 1980's) appeared. Then, the system froze. This was just displaying the desktop, not gaming. I checked my connections and fired it up a second time. It went through the BIOS screen and Windows loading screen, no problem, but when it displayed Windows XP, it looked even worse. I immediately shut it down. I stuck the crappy, old budget card back in and the system worked. Windows displayed a message saying it had recovered from a serious error.
The card seems to work from a cold start, but as it begins to warm-up, it begins to malfunction. Is there any chance that doing a "re-flow" will work. If anyone here has experience with that, please give me your advice on how to do it. I'm just a little nervous about throwing a computer part in the oven. I'm guessing I should keep it under 105 degrees C.