I think I've found the problem of all these crashes I had when I was hosting the pitboss. The fan of my videocard is
scorched off! 
It was probably a wire that burned off first, but when I looked yesterday night the fan itself, and what it was connected to, was all black, and all I could do was to tear it off. Luckily I still had a loose fan somewhere; one that you can place in stead of a PCI-card, which blows against the card next to it. It makes an awful lot of noise, but let's hope it'll cool the videocard sufficiently.
