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AlphaPC 21164 series motherboards
The AlphaPC 164 series were standard ATX motherboards that used commodity parts like DIMMs, power supplies, and PCI option cards. They were produced in several variants to support the different versions of the Alpha 21164 processor.
AlphaPC 164
The original AlphaPC 164 supported Alpha 21164 processors up to 500 MHz.
It featured four PCI slots (two 64-bit and two 32-bit), two ISA slots, two EIDE ports, and a floppy port.
Memory was FPM SIMMs, with a maximum of 512 MB.
An external, Level 3 (L3) cache of 1MB was supported.
This board requires a modified ATX power supply to operate.
Comes with the box and 4 connectors.

Alpha 22164 microprocessor motherboard (DEC) Vintage (NOS)
$700.00
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Documentation