Okay so i have a computer that has a sudden problem. First i noticed that when playing DVD's it would be extremely choppy looking i mean unwatchable, so i figured it was a codec problem, tried new ones..and to no avail nothing worked. So i went to do a system rebuild. Booted the CD and than i noticed that windows 7 and Vista were taking a very very long time to even load the setup. So whatever i waited the whole 40 minutes it took just to get to the setup screen. Did a full install (which took about 2 hours haha). After that happened it rebooted the PC, and than when the bios would post it locked up when trying to load the HDD (gets past the dvd boot etc) and than the keyboard was un responsive but not locked up (blinking underscore was still blinking) So i knew something was wrong, i changed the hard drive thinking it could be that, no dice, still the same slow choppy problem trying to even install vista or 7. So i let it go through again and still locked up same scenario. I have tried 3 hard drives, 2 sets of Ram, a different power supply and now im starting to think its just the south bridge chipset on this very expensive motherboard (i know its not that much money but for me who doesn't really game on a PC it's a lot of money) Any idea's anyone can throw at me Here are the specs if it helps CPU: AMD Phenom 9850 Quad-Core 2.5ghz GPU: XFX ATI 4980 (this is brand new) PSU: OCZ600SXS RAM:G.Skill 4GB DDR2 800 If it helps i haven't tried to o/c this set up at all. Any help would be awesome. I also can't update the bios (don't have a floppy) and can't get into windows at all. So im going to go with my best gut feeling and say its the Southbridge chip.