No. Every series until the IBM CMOS machines was water
cooled as far as I
remember although not every model in every line was water cooled. Up through
S/390 and including the ES/9000. Even the lowly 43XX (which was more
powerful than the biggest VAX ever made) was watercooled.
I do not know about that...I have a 4331, and it is slow as molasses
and dry as a bone.
--
Will