MX965Q2221.4.2 Installing the CPU Heatsink and FanThe Intel® Core 2 Extreme / Core 2 Quad / Core 2 Duo / Core Duo / Pentium 4 / Celeron DCPU processors require a specially designed heatsink and fan assembly to ensureoptimum thermal condition and performance.z Install the motherboard to the chassis before you install the CPUfan and heatsink assembly.z When you buy a boxed Intel® processor, the package includesthe CPU fan and heatsink assembly. If you buy a CPUseparately, make sure that you use only Intel®‑certifiedmulti‑directional heatsink and fan.If you purchased a separate CPU heatsink and fan assembly, makesure that you have properly applied Thermal Interface Material to theCPU heatsink or CPU before you install the heatsink and fanassembly.1. Place the heatsink on top of theinstalled CPU, making sure that thefour fasteners match the holes onthe motherboard.Orient the heatsink and fanassembly such that the CPUfan cable is closest to theCPU fan connector.Make sure each fastener is oriented as shown, with the narrow groovedirected outward.