Apple Xserve (Early 2008) DIY Procedure for Heat Ssink - Manual (Page 9)

Xserve (Late 2006/Early 2008) Processor Heat Sink Replacement Instructions 9
Clean off any existing thermal grease on the top face of the processor using the alcohol wipe 4.
provided with the replacement part, being careful not to get any thermal grease on the
processor contacts.
Apply the entire contents on a single syringe of thermal grease (approximately 4.5 cc) to the 5.
top surface of the processor.
Important: Be sure not to get any grease anywhere on the processor other than the very
top, flat surface that directly contacts the heat sink.