The default speed on this memory is 1066MHz DDR2 or PC2-8500 and memory timing is 5-5-5-15. 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 its MTCD Technology (Maximized Thermal Conduction & Dissipation). There are other memory companies doing something similar but most just have an aluminum heatspreader to dissipate the heat.