Hey techspot guys! Im leaving this thread because im really dissapointed with my board (P4M80-M4 Biostar) ok, the problem is that i have a intel celeron socket 478 2.50GHz, and my pc runs kind of slow, I go to Ebay.com and buy a Intel Pentium 4 HT technology socket 478 3.00GHz and 800 bus speed, when I put the processor on the board and turn the pc on the pc doesn't boot... I check the motherboard requirements again for some possibly "non-supported" feature or something but found nothing, the intel pentium I buy supose to run perfectly on my board. I tried everything, from jumping with the board jumpers; To install the newest driver version of the board. I do really dont know what to do plz, if someone have the same problem and solve it, plz tell me I dont wanna loose 33 dollars =( c ya.