EK-Supreme universal water block for all socket CPU's has been designed for the hardest enthusiast user. The base plate is made of electrolytic copper lapped and polished to +/- 0,0007 mm flatness. The top is made of quality POM Acetal. The EK-Supreme cooling engine uses fin design. The water accelerates through thin jet plate channels through 49 very thin channels, which gives extreme cooling surface. The copper base is also very thin, which gives very short distance for temperature to transfer from CPU to water. Supported sockets: Processor compatibility: - Intel® Pentium® 4, D, Celeron, Socket 775, Socket 478 - Intel® Xeon socket 603, 604, 771 - AMD® socket AM2, Athlon 64, Sempron, 754, 939, 940 CAUTION: Some 775 Socket motherboards have the heatsinks placed too close to CPU sockets. Please check that. In that case please buy Supreme 770 only mounting plate. We currently suggest 775 mounting plate for following motherboards: - ASUS Maximus Formula SE - ASUS P5K Premium and deluxe - ASUS P5E3 Deluxe - ASUS Striker II formula - Gigabyte X38 DQ6 - Gigabyte P35 DQ6