The AST Pentium Pro 150mhz tower unit, this video sees me pull it apart clean it rebuild it and start the process of testing it. I am about to collect some replacement hard drives, once I do I shall finish this machine off with a full installation video of NT4. 128meg SIMM RAM Pentium Pro 150mhz 256k L2 cache Quad speed CD Rom Price when new in 1995 $4560.00 !