The Free On-line Dictionary of Computing (30 December 2018):

DEC Alpha

    A RISC microprocessor from DEC.  In November
   1995, the Alpha was purportedly the fastest non-research chip
   used in commonly available workstations.  It is
   superpipelined and superscalar.  In February 1996 it was
   clocked at 200 MHz and in March 1998 at 666 MHz.

   (1998-03-17)