[jabl]

The Cray T3D and T3E used Alpha processors. But it wasn't really shared memory, each node with 1/(2?) CPU's ran it's own lightweight OS kernel. There were some libraries built on top of it (SHMEM) that sort-of made it look a bit like shared memory, but not really. Mostly it was a machine for running MPI applications.

A decade or so later on, they more or less recreated the architecture but this time with 64-bit Opteron CPU's in the form of the 'Red Storm' supercomputer for Sandia. Which then became commercially available as the XT3. And later XT4/5/6.