I have an AMD x2 6000+ system that just started having a strange problem. Motherboard is an Asus M2N68-VM. It was working fine but I did 2 things to it. 1: The stock CPU fan was kinda noisy so I put in a 120mm cooler. 2: I bumped the FSB up 10mhz (no other settings changed) but it didn't boot so I reset the bios with the jumper. Since then it's been acting strange. In the bios screen, the menus work quickly for awhile but then it starts lagging and the screen refresh is very slow for about 7 seconds then it responds quickly again. I first thought the CPU may have been overheating and throttling back until it cooled but CPU temp in the bios is stable at 36c. The same thing is happening in Windows 7. In games, the framerate will normally be about 60fps then drops to like 3fps for 7 seconds then resumes 60fps. When viewing idle cpu load in taskmanager, it's sitting nice and idle. Things I've tried... Another graphics card Bios reset Bios update (asus claimed the update fixed a thermal issue so why not) Put stock cooler back on Looked for bad caps on mobo. I don't see any. I'm about to try different memory but I doubt that's the issue since the system doesn't bsod or restart. It just lags out. Anyone seen a problem like this? EDIT - Forgot to mention I tried reseating the cpu in the socket and the bios reported new processor installed - press f1 to continue or f2 to load defaults. (or something like that) I wonder if there's a bad connection on one of the pins or the socket to motherboard connections.