Okay, so I build my own systems and I try to figure all these things out on my own, but I'm beyond lost on what RAM to get my motherboard. Recently, Memtest86+ is registering defective areas in addition to a BSOD BCCode124 (hardware failure), so I'm pretty much positive the RAM is shot. Since I now have Windows 7 64bit on the system, I'd also like to take the time and upgrade from 4GG to 16GB. My questions are below and pertinent information beneath that. Thank you TH Community for all your outstanding help!! 1.) Is there such a thing as too much RAM? I am a graphic designer so I use the Adobe CS5 suite regularly. 2.) What does the 1066, 1333, 1600 mean? I'm not interested in OCing or anything crazy. 3.) The RAM I want is not on the Qualified Vendor's list because my MB is too old (there isn't a single 8GB or higher listed on the QVL). How can I figure out if the RAM would be compatible with it? 4.) Anything I'm missing? Any tips or suggestions? I'm open to any RAM really, but would like to stay under $150. Thanks guys and gals! I really appreciate your help! My motherboard: newegg.com/Product/Product.aspx?Item=N82E16813131398 My current RAM: newegg.com/Product/Product.aspx?Item=N82E16820231193 What RAM I'm looking at: newegg.com/Product/Product.aspx?Item=N82E16820231315 or two sets of this kit from Crucial: newegg.com/Product/Product.aspx?Item=N82E16820148347&Tpk=CT2KIT51264BA1339 Please let me know if you need any other information!