Guys, I've got a terrible news for myself I guess the RAM is faulty. So I think the video card is functioning fine. X9100 at its native speeds EDIT: running Throttlestop causes reboot. I'd like to repeat with the official BIOS, but I can't now. So I would appreciate if anybody could do that instead of me. I would launch a game and play for a while, but due to the RAM is not functioning well, I will postpone that until I figure out the cause. EDIT: That was an old 2.99 version. Now I'm running 7.00 and it's working fine. This is just an example, don't use it. The setup is unstable.