I currently have an HP DL380 G5 server with dual QUAD Core E5440 2.83Ghz processors and 8GB of RAM. This server is running Server 2008 STD 64-Bit with Exchange 2007. I am in the process of moving my company toward virtualization. I will be purchasing an EMC AX4 iSCSI SAN to solve some hard drive space issues on a couple servers and provide disk space for my future VM's. My question is can I run Hyper-V on the server described above? It will be running side by side with Exchange 2007. I know this is not best practice by any means, but we are a small company of 65 users in one location. I have been benchmarking the CPU utilization and it is currently averaging at 3% with a peak of 8% over the course of 2 days. I have the ability to purchase another server for VM's if necessary, but I will need to be able to justify the purchase, and the CPU testing is not exactly going in my favor.