Greetings, I am hoping some of you folks around here could help me out with some of my x-mas shopping. I would like to upgrade my husbands computer, he is currently running on 512 MB of ram, and I would like to boost that up for him. I read online a little about some of my options, and ran into this: The Sony Vaio PCV-RX860 uses PC-2100 type memory and has 3 bank(s) of 1 socket(s) each for a total of 3 memory socket(s) . The Sony Vaio PCV-RX860 comes standard with 512MB of RAM and supports up to 1.5GB of RAM . Choose from the memory modules listed above for guaranteed compatible upgrades for your Sony Vaio PCV-RX860. This is what the ram slots look like inside his PC. Now, this article states that I can only upgrade up to 1.5GB of ram. At Bestbuy, I would like to order him this: PNY - 2-Pack 1GB PC2-5300 DDR2 Memory. But I don't know if this is compatible with his PC, or if it is, if it will even fit/work. My greatest thanks to anywho who can help me out. I would like to order this item soon before its too late.