Asus Xeon 5U Rackmount Server AP1720-E1 - Manual (Page 23)

2-7 ASUS AP1720-E1 barebone server
2.3.2 Installing the CPU heatsink and fan
CPU thermal plate
This motherboard requires a thermal plate for each of the CPUs. The
thermal plates are already installed underneath the motherboard when the
system is shipped.
In case you need to remove and re-install the thermal plates, refer to the
picture below for the correct matching of the motherboard and thermal
plate holes.
Standoff Motherboard hole
CPU thermal plate
The system package came with two sets of CPU heatsink and fan
assemblies. Use ONLY the bundled CPU heatsink and fan to ensure
optimum thermal condition and performance.