[xaerise]

Not many.

At my previous company they had two servers with dual Itanium CPUs. One CPU failed and they bought a spare used one from Germany.

We were informed that there was about 10 CPUs left for spare in the world by our provider.

The company decommisioned the servers in 2019 so now there are probably four more :p

But since it is a failed architecure, there can't be that many production systems ( < 1000 )