I have a Windows Server 2008 R2 on 64bit machine with 16 GB RAM and 2 x E5620 CPUs. This host running VMware 2.0.2 with 5 guests:
- 3 x Windows 2008
- 2 x Windows 2000 (after p2v - VMware convertor)
they all configured to use 1 CPU (not specified one.)
They are all using maximum of ~500 Mhz. For example, my Windows 2000 CPU reach 100% without effecting the host CPU, I mean when the guest CPU is 100% - it's using 284 Mhz of the host while the host CPU usage is 10% (generally, when I check at task manager).
Operating system use uniprocess without any hidden devices at device manager.