Here are the specs on my parents old computer: eMonster | 600, 550, 500 and 500a Napoli-2 Micro ATX (STX V1.2 form factor) motherboard, TriGem, Korea Single Edge Contact Cartridge design with Slot 1 connector Intel 443 ZX core and ITE8673F Super I/O controller Add-on AGP 3D graphics accelerator slot Crystal CS4281/CS4280 built-in Sound Blaster Pro, MPC-3, MPU-401 compatible Audio Enhanced Stereo full duplex operation I bought Zoo Tycoon 2 for the kids to use on their computer, and the processor need to be upgraded to at least 733mHz. I ordered a Slot 1 866 MHz Pentium processor through eBay and just tried it out in the computer, but my computer does not boot-nothing on the screen-no beep (to my recollection). The 600mHz processor had a fan and the 866mHz did not come with a fan. Do I need a special processor for this motherboard? Or do I have a defective processor? And do I need to order a fan for whichever processor I reorder?