to see what kind of cpu I had. Built this system myself 4 gb ram, 4 seagate hard drives (actually gets confusing when in fdisk or your favourite equivalent.), yada yada. I went to the computer store I said I needed a motherbord/cpu that didn't have any issues with my flavour of OS. The dude behind the counter said this one will do fine blah blah. My point is I was concerned about the Hard Drives, ram, case, and how many slots were on the motherboard. Nowadays I buy based on the best deal cpu manufacture/ speed doesn't matter to the desktop user / possible occasional gamer. But $50 means I could buy extra ram or Hard Drive space.