My son has an alienware system that has 1gig memory - two sticks of Corsair xtreme memory speed, cmx512-3200LL, xms3200, 512mb 400mhz, 2326, xms3205v1.2, 0405090.........at least that's all the numbers I can find on the side of the memory stick. I need to replace one of these sticks as it is bad. I search on ebay and find this: http://search.ebay.com/corsair-cmx512_W0QQfkrZ1QQfromZR8 Which numbers do I have to match to ensure the new stick will work in his machine??? Where is a good place to buy this? Are those prices on ebay any good? I don't do the auction thing, so unless there is a buy it now I don't do ebay. Thanks Wayne Wanna kill these ads? We can help!