I've read that it should be possible to push the SE/30 to its maximum RAM capacity with eight pieces of 16 MByte, 30-Pin SIMMs. I've never seen such a machine in the wild. Neither with 64 or 80 MB. Memory test takes a notable amount of time when having 16/20 MB RAM in it. I wonder how long a memory test with full blown 128 MB would take. I'd prefer first-hand real-world measures with a stop watch, not a theoretical calculation.