Hey guys I helped a friend spec out the following build last week; AMD FX-4100 Zambezi 3.6GHz (stock oem cooler) MSI 970A-G46 AM3+ AMD 970 SATA 6Gb/s USB 3.0 ATX Mushkin Enhanced Blackline 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 EVGA 01G-P4-3650-KR GeForce GTX 650 Ti 1GB Western Digital WD Blue WD5000AAKX 500GB 7200 RPM SATA 6.0Gb/s LITE-ON DVD Burner - Bulk Black SATA Antec NEO 520w psu He is running win7 64-bit all updated. He was having random shutoffs after 15-30 mins of gaming. I asked him if he has the cpu cooler hooked up correctly he said yes. He left the side off his case and put a big fan blowing on it and was able to play for 2-3 hours without issue. So, to me it looks like a cpu over heat. He assured me he removed the plastic from the cooler. I said what about the locking collar? He wasn't sure because its his first amd build. Thoughts? TIA!