The Cray-2 released in 1985 was a 4 processor liquid cooled computer totally immersed in a tank of Fluorinert, which bubbled as it operated [REF].
The Cray Y-MP, also designed by Steve Chen, was released in 1988 as an improvement of the X-MP and could have eight vector processors at 167 MHz with a peak performance of 333 megaflops per processor [REF].