I had a PA-RISC workstation too. No heat problems, but it wasn't particularly fast. But the "superdomes" (Refigerator sized computer in the very cold and loud server room....).

It was weird, I worked on those superdome machines for years without seeing them. and only got to see them when they had to debug some of my serial port code (it turned out the cable was wired wrong...)

HPUX had some really interesting Real Time Extensions. I was on a exploratory group for switching to Linux and scheduling control was going to be a problem (15 years ago...)

Yeah we had a superdome at work too. One of the earlier beige PA-RISC ones (the itaniums were black IIRC).

But those were in a class of their own... :) If you scale things up that big they're going to belch heat no matter the architecture.

I don't think PA-RISC was inherently worse at performance to Watt than other competing processors at the time.

I love my HP PA-RISC "Gecko."

https://bytecellar.com/2016/03/02/a-quick-tour-of-the-hp-900...