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The DECchip 21064 Evaluation Board (EB64) is an evaluation board released in 1993.

• DECchip 21064 CPU at 150 MHz ¹⁾
• 512 KiB external backup cache (Bcache) of 12 ns SRAMs, configurable to 256 or 128 KiB
• 4x 36-bit DRAM SIMMs, supports 4 MiB to 64 MiB with parity, 128-bit data path
• 2x ISA slots, driven by a VLSI Technology SC486 (VL82C486 and VL82C113A) ISA bus controller, which also provides the interrupt controller, DMA controller, timers, real-time clock, and keyboard and mouse interfaces
• SMC FDC37C651 Super I/O controller providing 2 serial ports and a floppy disk controller
• AMD Am79C960 PCnet-ISA Ethernet with 10BaseT and 10Base2 interfaces
• Serial ROM (SROM) for CPU initialization
• 2x PROM sockets: a 512 KiB or 1 MiB debug ROM containing the debug monitor, and one user-programmable
• High-speed 21064 pin-bus expansion interface

DEC made SRM consoles available for its evaluation boards, including the EB64, as part of its evaluation board software development kit. ^{2) 3)}

Linux has not supported the EB64 since November 1995, when support was removed at DEC's request because the board was out of production and had never sold in volume. ^{4) 5)}

The EB64 should not be confused with the PCI-based EB64+ or AlphaPC 64; some mailing list posts use "EB64" to refer to one of those boards.