 The VAX 4000 Model 108, code-named ""Cheetah-Q++"", was introduced on 8 October 1996 to replace the VAX 4000 Model 106A.It was discontinued on 30 September 2000, with the last systems shipped on 31 December 2000.It used the KA57 CPU module containing a 100 MHz (10 ns cycle time) NVAX microprocessor with 512 KB of external tertiary cache.