Got my 1900XT yesterday and everything was fine when I went to bed, decided to have a quick game on CS:S before I went to work this morning and it was playing at unusually low FPS, I'm talking between 20 and 40FPS. I've reinstalled Windows thinking maybe there was a driver conflict or something and it's still doing, I tried the CAT 6.3, 6.4 and 6.5 betas.
Dunno if I should RMA it or not.
Dunno if I should RMA it or not.