I bought a new HIS IceQ HD4850 card 2 weeks ago. The card has very good cooling and normally stays around 45 C idle and around mid 50s during gaming.
The problem is, after 3 or 4 hours of gaming, the temperture will slowly rise to high 50s and close to 60 C. I will start to see artifacts in games for 5 ~ 15 mintues (artifacts getting worse and worse) and eventually the card will crash (screen turns black with no signal error and I have to reboot the PC.) I even tried to underclock this card to 625 GPU & 1000 memory (below the default speed out of the speed) and the problem still happens, artifacts just seem to show up after 57~58 C ...
From what I have read, 60 C should be considered as a low temperature for 4850 so cooling is not the issue here. Do you guys think that I have a defective card?
The problem is, after 3 or 4 hours of gaming, the temperture will slowly rise to high 50s and close to 60 C. I will start to see artifacts in games for 5 ~ 15 mintues (artifacts getting worse and worse) and eventually the card will crash (screen turns black with no signal error and I have to reboot the PC.) I even tried to underclock this card to 625 GPU & 1000 memory (below the default speed out of the speed) and the problem still happens, artifacts just seem to show up after 57~58 C ...
From what I have read, 60 C should be considered as a low temperature for 4850 so cooling is not the issue here. Do you guys think that I have a defective card?