So, I would like to purchase some ram for my computer. I have a Dimension E520, Pentium D processor 915 with Dual Core Technology. The memory I have now, is 1GB Dual Channel DDR2 SDRAM at 533MHz- 2DIMMs. I was looking around for what to get and I saw a Kingston 2GB (2 x 1GB) 240 pin DDR2 SDRAM DDR2 667 (PC2 5300) Dual channel kit desktop memory. I intended on purchasing two of those, making it 4 gigs total. I am a gamer chick primarily, so the computer gets a bit of a work out, so I thought 4 gigs would do the job, since the current 1 gig is not really cutting it anymore. I tried some research myself and I think one of the forums said that the computer could hold 4 gigs, but would basically use just 3. I have a friend who was telling me that I shouldn't get the 4, that I should settle for 2, because something about my computer not running the 3 in dual channels because the fourth isn't recognized, so it will run slower with those 4(3) than it would if i just purchased 2. I was wondering if anyone here could clear that up for me and point me in the right direction as to what to buy. About ready to pull my hair out with it, hope you can help Much appreciated!