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Socket 8 is a unique rectangular CPGA socket with 387 pins. It supports FSB speeds ranging from 60 to 66 MHz, a voltage of 3.1 or 3.3 V, and support for the Pentium Pro and the Pentium II OverDrive CPUs. Socket 8 also has a unique pin arrangement pattern. One part of the socket has pins in a PGA grid, while the other part uses a SPGA grid.
An engineering sample of the Pentium II Overdrive CPU showing the bottom of the unit.