Supermicro PIIISEA, User Manual

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Chapter 2: Installation
2-3
Installation
2-3 Mounting the Motherboard in the Chassis
All motherboards have standard mounting holes to fit different types of chassis.
Chassis may include a variety of mounting fasteners made of metal or plastic.
Although a chassis may have both types, metal fasteners are the most highly
recommended because they ground the motherboard to the chassis. For this
reason, it is best to use as many metal fasteners as possible.
Figure 2-1. Universal Retention Mechanism (URM)
Arm (in upright
position)
*Note: The Pentium II processor comes in the SECC package, which has locking
tabs on the top corners. Before installing the Pentium II, push these two locks
inward until you hear a click. When you have fully seated the processor into the
Slot 1 connector, these locks should return to their outer positions.
With the heat sink facing toward the DIMM memory slots, slide the SECC*/
SECC2/SEPP processor package into the URM and continue pushing down until
it is fully seated in the Slot 1 connector.