If you are looking to overclock your system without the guess work that might usually accompany the process, something like the Patriot Memory Viper II Sector 7 1800MHz 6GB DDR3 kit would be a good choice. With an XMP profile included for 1800MHz operation, it takes just a few clicks in the BIOS in order to be up and running faster than a more typical kit.

Patriot Memory Viper II Sector 7 1800MHz 6GB DDR3 Kit Review @ Bigbruin.com