Processor and heat sink replacement
Use the following procedures to replace an assembled processor and heat sink, known as a processor-heat-sink module (PHM), a processor, or a heat sink.
Before you begin replacing a processor, make sure that you have an alcohol cleaning pad (part number 00MP352) and gray thermal grease (part number 41Y9292).
Cascade Lake processors are supported on the system board with part number 01PE840. If you use the system board with part number 00MX681, update your system firmware to the latest level before installing a Cascade Lake processor. Otherwise, the system cannot be powered on.