HP Netserver L Server series - Manual (Page 55)

Chapter 6 Installing an Additional Processor
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NOTE If you are upgrading the second processor to a faster processor
speed than the primary processor, the primary processor must
also be changed. Both processors must have the same product
number, which includes the same clock speed, cache size, and
FSB speed. The supported processors only perform at the rated
speed indicated on the processor in the HP Netserver.
CAUTION Always wear a wrist-strap and use a static-dissipating work
surface connected to the chassis when handling components.
Ensure the metal of the wrist strap contacts your skin.
8. Open the ZIF (Zero Insertion Force) lever to allow removal of the terminator
installed in the processor socket. See Figure 6-3.
You need to pull the lever out away from the ZIF socket and then raise it to a
full 90
° to the system board.