Not a lot of it, actually. Just a Power Mac G5 dual-core (2005, PCIe, DDR2) which I use to test Void on BE, and a PowerBook G4 15" (2004), otherwise it's all new stuff (a couple POWER8 servers, my Blackbird daily driver desktop, Talos 2 Lite which is mainly a Void buildserver). I intend to expand this as opportunities arise, as there's never enough testing hardware.