Memory but hear me out. I swapped motherboards between my server and desktop. Just the motherboard. All the components stayed with their respectable computer. The server went together without a hitch. The workstation (desktop) however didn't. First thing that happened was when I pulled the heat-sink off (big heat-sink) I bent the 7 or 8 pins on the CPU because the heat-sink pulled out the cpu and I didn't un-clip the cpu first (lesson leaned) that I painstakingly bent back. Next: I boot up the workstation and It reboots as soon as it goes into windows. I pulled a stick of ram and it went into windows but then rebooted again after 20-30 seconds. I'd assume it was a heat problem but when I put the thermal compound on there I didn't put too much and the heat-sink is firmly attached. I'm about to go pull it again and re-apply artic silver but in lue of that does anyone have an idea what it could be? The reason I think It might be memory related is the memory I've had problems with before. This is a 3mth old set that was RMA'd. It is G.Skill F2-6400PHU2-2gbhz DDRII 1 gb. PC2-6400 CL4-4-4-12 2.0v-2.1v This motherboard is not very configurable and asus site is taking forever to load (literally still loading after 5 minutes) for me to look at the specs ( ASUS M2A-VM AM2 AMD 690G Micro ATX Motherboard ) but I figure if the ram was recognized it would work. Maybe it's undervolted?