I bought a video card(GTX 260) 4 weeks ago and its been running in my computer fine for about 2 weeks. Now my computer freezes everytime i play a game longer than about 10 or 15 minutes.It seems like the northbridge or MCP as it says on my bios is whats overheating the most although my processor runs a little hotter also. My northbridge is right next to my video card also.I have a 780i motherboard so i have 3 other pci express slots i tried moving my video card farther away from the northbridge but it will not let me use the other slots unless for sli. My northbridge has a heatsink on it and it came with a fan that my manual said was only needed if i was going to overclock it so i never put it on cause i was not plan on overclocking and now i do not have that fan anymore. Any suggestions for me on what i can do or a link to a fan i could use would help also.