I received my kit today. they run 900 4-3-3-6. 1000-1066 5-4-4-12 on my EVGA 680i. They do not seem to do much more than advertised, very stable at or a little above spec. I can get much faster and tighter with 4x1gb. I do not have any screenies and havent really given them the tweek time they deserve, the speeds will probably increase. My time atm is devoted to 6GB. These Mushkins w/ 2 x 1gb ddr-1200. So far i am very pleased with those results. If anybody is interested in my 6GB numbers, let me know, I will start a new thread with detailed info & SS. Also let me know what test/benchmarks you would like to see.