Corsair claims it is first memory manufacturer to ship DDR2 memory clocked at 1 GHz. The XMS2-8000UL run at latency settings of 5-4-4-9 and - as the competition - were developed in cooperation with Asus for the i955X-based P5WD2 Premium motherboard.
^^ enough said, but although its 1GHz i still dont like my CAS latencies over 3

http://www.tomshardware.com/hardnews/20050526_225107.html