The default speed on this memory is 1066MHz DDR2 or PC2-8500 and memory timing is 5-5-5-15 (CAS-TRCD-TRP-TRAS). With a fast memory speed and a reasonably tight memory timing, GeIL EVO ONE memory was definitely designed with the gamer in mind. Not only that, it's available in either a dual channel configuration or a quad channel configuration at PC2-6400 & PC2-8500 speeds. Where this DDR2 memory sets itself apart from most other memory is it's MTCD Technolody (Maximized Thermal Conduction & Dissipation). There are other memory companies doing something similar but most just have an aluminum heatspreader to dissipate the heat. These memory modules have a heatspreader, heatpipe and fins which allows them to clock higher and remain cooler. Overclocking is also very good and I hear the PC2-6400 kits are doing very great as well.

For more detail information, please go to the link below:

http://www.3dgameman.com/content/view/12672/103/