I just got my ATI X1900 XTX "taken straight off a new system" from eBay today. I installed it and ran a few games, and it seems okay. However, during bootup (after the windows loading screen but before the select user screen), it always displays a second of graphical corruption. In addition to this, the screen flickers kind of weirdly when opening the ATI Control Center. However none of the games had any problems and neither did windows (except for bootup). Do you think I should return it? I have three days. A broader question is how can you tell if a new graphics card is working? I mean other than waiting for something obvious to happen. Do you just play a lot of instensive games on it? Is there a better way?