The Xigmatek Dark Knight S1283 heatsink FrostyTech is reviewing today is equipped with vibration absorbing rubber fan posts, a 120mm internally illuminated PWM fan that scales in speed from 1000-2200RPM, and a glossy black nickel plating that case modders must love. The 600gram Dark Knight S1283 heatsink is compatible with socket 775 Intel Core 2 Duo/Quad CPUs, and all socket 754/939/940/AM2 AMD Athlon64/Phenom processors.