We ended up with SGI machines for technical data processing (huge amounts of data), tons of processing going on in parallel. We went through DEC systems (Alpha), Sun, HP, IBM. The SGI systems could handle way more load than any of the others without trashing. And several other reasons. A happy choice.

I still have a few SGI systems in my basement. Octane, Fuel, some Indy boxes.. O2..

You should boot them and if nothing else, idle them so the circuits do not degrade too much.

Sitting with no power is bad for SGI computers.