Hello everybody! I am also having this crashing issue with the HIS H687F1G2M Radeon HD 6870 1024MB GDDR5 PCIe 2.1 x16 Video Card. I get about 10 minuets of gameplay on BF2BC and my pc just shuts off completely. Originally I thought it was my 500w power supply so I bought a 1000w supply and the game still crashed. I've also tried reinstalling the game but no luck. Everywhere online there doesn't seem to be a solution.
I have this exact same problem. Just crashes the whole computer in a multiplayer game. Tried all the suggestions. I only have issues w/ Battlefield Bad Company 2. Every other game is fine. I have Windows 7 x64, XFX HD 6870 x2 (crossfired), 6 gigs ram, AMD Phenomx4, 1000 watt power supply. I'm pulling my hair out can someone please help.