Chapter3 Installation / 17Central Processing Unit (CPU)This main board provides a Single Edge Contact (SEC) slot forPentium II/III processor packaged in an SEC cartridge. The SECslot is not compatible with other non-Pentium II/III Processors.Installing the Retention MechanismThe Mainboard package includes a Retention Mechanism. The Re-tention Mechanism is used to hold an Intel Pentium II/III Processorto the Intel Slot 1 connector. Make sure the system board is on aworkbench (not in a chassis).To install the Retention Mechanism, follow the steps below:1. The Retention Mechanism package includes a Retention Mecha-nism with captive nut and four captive screws.2. Hold the Retention Mechanism upright and position it above theIntel Slot 1 connector.3. Insert the captive screws attached from underneath themainboard as shown, and four screws 2 mount bridges directly.Note: Don't forget to attach the screw seal beforeinserting. Nut is built into the base of RetentionMechanism. It's convenient to tighten screwdirectly.