Corsair Dominator GT 6GB DDR3

Go to the Corsair web site and enter your mobo into their configurator. You will get a list of compatible parts. The dominator should be on that list. Get the cheapest supported kit.

The speed on the ram is the maximum speed that the ram can safely achieve when overclocked at the stated 1.65v. It really does not matter. The nehalem processors are insensitive to ram speeds. There will only be a diffference of 1-3% in real application speeds or fps(synthetic benchmarks show very well but mean little)

For most OC the TR3X6G1600C8D is almost unbeatable. http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The {CMT}6GX3M3A2000C8 is a step backwards from the CMG; the newer Corsairs as with ANY 1800+ MHz RAM are touch and go and problematic. Unless you are looking to build all water then stick with the rock solid Corsair {TR3X6G1600C8D}. For 2000 MHz I would recommend the Kingston HyperX H2O.

Tested - http://www.corsair.com/configurator/product_results.asp...

Comparison Module #1: Mushkin Redline 996805 6-8-6-24 1600MHz
Comparison Module #2: G.Skill Pi Series 7-8-7-24 1600MHz
Comparison Module #3: Mushkin 998687 8-9-8-24 1866MHz
Comparison Module #4: Corsair Dominator TR3X6G1600C8D 8-8-8-24 1600MHz
Comparison Module #5: Kingston HyperX T1 9-9-9-27 1600MHz
Comparison Module #6: Mushkin Blackline 998677B 7-7-7-20 1333MHz
Comparison Module #7: Patriot Viper II Sector 7 9-9-9-27 1800MHz

Thank you both for your contribution, itwas much appreciated and helped me understand alot. Thanks again,