Dynatron 1U LGA 775 Fan & Heatsink for Intel Quad-Cores (P199) - NEW CPU: Intel Socket 775 Quad Core Q6700 & Q6600, Core 2 Extreme X6800, Core 2 Duo E6850, Pentium Dual-Core E2180, Pentium D 960, Pentium 4 Extreme Edition, Celeron D 365 & Socket 775 Dual-Core Xeon 3000 Sequence for 1U Server.