I got my HIS 6870 today and its got great performance. I maxed out all my games but I'm having a little trouble with BFBC2. Everytime the temp goes up to 75 C my computer just automatically reboots itself. My old 9600 GT got to 77 C without these problems so I don't know whats wrong. I have it at stock clocks and the latest drivers. Is it something in my BIOS that's causing this? I've read that these cards would go up to 80 C while gaming.