Dell XPS 730x
OS: Vista 64bit Ultimate SP2
HDD: Western Digital Sata 640gb
Processor: Intel i7 940 2.93ghz
Video Card: ATI Radeon HD 4870x2
RAM: Samsung 6gb DDR3 1066
Motherboard: Intel x58
PSU: 1000w
It happens with any graphic intensive ones usually, but it has BSODed while playing others that aren't quite as intense graphicwise.
It doesn't happen outside of games.