American Megatrends MegaPlex II, System Manual

Page: 20 / 140

Megaplex Quad Pentium II Xeon PCI ISA System Guide 12
Step 2 Configure CPU Board,
Continued
Warning
Improper CPU installation can damage the CPU and the
motherboard. You must follow the procedures in this
section exactly as documented. Make sure you wear an
antistatic wristband while installing the CPU. Follow all
antistatic procedures described on page 8.
Install CPUs You must mount the CPU Retention Unit before the CPU is installed. Also the
heatsink (provided in the kit) should be mounted on the CPU before the CPU is
inserted in the slot. The retention mechanism includes:
•
base mechanism (4 pieces),
•
top covers (4 pieces),
•
ears (8 pieces),
•
pegs (4 pieces), and
•
screws (6-32, ¼ inch) with nuts (16 pieces).
Note: If you plan to use heatsinks other than the ones provided in the kit, make
sure that the CPU mounts properly in the retention mechanism with the
heatsinks mounted on them.
Mount Retention Unit and Heatsink
Step Action
1 Take one base mechanism and place it directly over the CPU Slot 0
(U22). The position of the mounting holes on the mechanism is
asymmetric so that the unit can be placed in only one position over the
slot. The mounting holes on the mechanism superimpose over the
mounting holes on the CPU board.
2 Insert one screw from the bottom of the board in a mounting hole, and
tighten a nut on it from the top. Repeat for the other three holes.
Note: Do not use excessive force to tighten the screws, as this can
damage the board/retention unit.
3 Repeat step 1 for Slot 1 (U30), Slot 2 (U45) and Slot 3 (U56).