Asus P9D-X User Guide - Page 31

2.3.2 Installing the CPU heatsink The Intel® LGA1150 processor requires a specially designed CPU heatsink to ensure optimum thermal condition and performance. • When you buy a boxed Intel® processor, a specially designed CPU heatsink or a CPU heatsink with a CPU fan assembly is included depending on the package. If you buy a CPU separately, ensure that you use only Intel® certified multi‑directional CPU heatsink or CPU heatsink with CPU fan. • Use an LGA1150-compatible CPU heatsink and CPU fan assembly only. The LGA1150 socket is incompatible with the LGA775 and LGA1366 sockets in size and dimension. If you purchased a separate CPU heatsink and fan assembly, ensure that the Thermal Interface Material is properly applied to the CPU heatsink or CPU before you install the heatsink and fan assembly. Ensure that you have installed the motherboard to the chassis before you install the CPU fan and heatsink assembly. To install the CPU heatsink and fan: 1. Place the heatsink on top of the installed CPU, making sure that the four fasteners B match the holes on the motherboard. 2. Push down two fasteners at a time in a diagonal sequence to secure the heatsink and fan assembly in place. A B A A B B A Orient the heatsink and fan assembly such that the CPU fan cable is closest to the CPU fan connector. ASUS P9D-X 2-11