Hi i have a computer that keeps on freezing when i play games or just use graphics. first i will start with a short history about the computer. In 2010 i bought a Asus M4A79XTD EVO Mainboard, with it i also bought: Sapphire radeon HD 5770 Graphics card, Corsair TX650W Power supply, Amd Phenom ii x4 965 Black Edition 3.4ghz(HDZ965FBGMBOX), and some Corsair Vengance ram 4gig. dont remember the exact name. I started of with putting the computer together and installing windows 7, after 4 weeks i started getting a error with a Bsod, and computer just restarted. In the event logger it said: A corrected hardware error has occurred. Component: AMD Northbridge Error Source: Corrected Machine Check Error Type: 28 Processor ID: 0 The details view of this entry contains further information. So i called the place where i bought the computer and wanted to know if they knew smth about this. They didnt know anything so i sent in the Motherboard with the cpu for testing. 3 weeks later i got the computer back with pretty good documentation that nothing was wrong. I installed everything and it toook 5 days then the same thing happened again. I put the computer away and saved up some money to buy some new stash. So this november i started ordering new parts wich is: Sapphire Radeon HD 6870 1GB GDDR5 Cooler Master GX 550W PSU MSI 990FXA-GD65, Socket-AM3+ Seagate Barracuda® 7200.12 1TB After i got all the parts i started building it up again and installing windows 7 ultimate. after about 1 month i get a complete freeze of the computer while playing Starcraft 2 so i vent to the event logger again and found the same error msg as with the other setup. Conclusion is i have changed out everything in the computer exept for the Ram and the Cpu. Today i ordered a new Cpu wich is AMD FX-4100 4-Core Processor. If this doesnt work i really have no clue what to do. Oh yeah i have tried memtest, stresstests and every test you can run to see if smth is wrong with your hardware and nothing shows any flaws. Im pretty desperate of help right now cause most of my money is going in to this computer atm and dont want to change out everything again, although its probs 2 changes of absolutly everything. Dear regards a fellow Nerd.