 It used the KA694 CPU module containing a 111.12 MHz (9 ns cycle time) NVAX microprocessor with 2 MB of external tertiary cache.The VAX 4000 Model 106A, code-named ""Cheetah-Q++"", used the KA54 CPU module containing a 100 MHz (10 ns cycle time) NVAX microprocessor with 512 KB of external tertiary cache.It was replaced by the VAX 4000 Model 108.