Cray (yep those guys are still alive and kicking – I know, I know I am as surprised as you). In any case these clever guys have released a “ personal super computer ” called CX1 which can have 64 Cores and address 64 GB of RAM and can run either Windows HPC 2008 Server or RHEL .
Now, once I have stopped drooling, just need $30K (or so) to get this sweet sweet machine at home. 😁