I have a Windows 8 RTM Enterprise with VMWare 9 installed. I run a couple of VM's but as you can see in the image below my CPU usage never crosses ~50% with 4 VMs running. Even if I run like 8 VMs with a test process to consume a lot of CPU it still remains at 50% but now the host and guest machines slows down. Also, Why does the frequency not change here to the top speed?
The left side of the image contains Process Explorer which shows ~100% Utilization while running 4 VMs. I am not sure, is this is a bug in Task Manager? or is it a setting of mine?