Heya, looking to get some more ram, currently have 1gig. Newegg.com - OCZ Platinum 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Dual Channel Kit Desktop Memory - Retail is that im looking at specifically, although just a few questions, can you mix and match ram? ie keep my old ram in the PC in addition to the new ram for a total of 3gigs? also open to suggestion for different sticks in the same price range if you think they are better. Will i notice a big difference between 1 and 3(or 2?) gigs of ram? thanks