Thanks for the information, it really helped. I'm looking to buy a kit of two 1Gb sticks. I'm only not sure yet if to go with Kingston, Corsair, Crucial or OCZ's RAM. Any suggestions? This PC is mainly used for Battlefield 2 & 2142. I still have the original box and manual booklet but I think Asus has the same manual booklet for several P4P800 series mobo's. It just says on the book P4P800 but I believe I have a P4P800-S or SE, for sure not deluxe or the other ones. On the mobo it self it says P4P800-UAY Thanks again