Hey I bought a Wintergreen socket 478 barebone off of TigerDirect and i got a Celeron D 2.80 GHz Processor, a 120 GB Western Digital (Caviar Special Edition) Hard Drive, The only other thing i put into it was 512MB of PNY PC3200 RAM, which i have one more stick of it to put in. But Whenever i try to start up the computer, it turns on for a short period of time, maybe 10 sec., then shuts off. And depending on how recently its been on, the 10 seconds can change from 10 sec. - 0 sec. I dont have a cpu fan or heatsink, and im thinkin thats the problem, if anyone thinks it could be something else please help me.....