Has anyone had any experience with Samsung ram? I am considering buying 2 gigs off of ebay for my brother's pc, but I don't know if it will be reliable or anything. It will go with a phenom II 550BE and I will not be overclocking. The ram does not include heatspreaders, but is this an issue if I'm not overclocking? Also, it is 533, so does that make much of a difference in light gaming? Thanks.