performance tuning with server 2008 and HyperV

I have a 2000 server running Exchange and Terminal Services on a P3-based computer with SCSI drives and 2 gig of RAM. There are no performance issues at all with the system currently.  I would like to virtualize it so that is running as a virtual session under 2008 64 bit version with HyperV and the latest greatest hardware platform and 8 gig of RAM. On paper the specs of the new hardware system - quadcore 2.83 MhZ and Raptor drives - are approximately 3 or 4 times as powerful as the old system so there would be a dramatic performance improvement if I ran the old system  native   on the new hardware. What kind of performance hit would I take virtualizing it?  As long as it's as fast after virtualization as the old system that's fine.  Again, there is no need at all for performance improvement.
lineonecorpAsked:
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brent_caskeyCommented:
You should see performance gains with what you are doing. The overhead on Hyper-V is extremely low. QLogic stated that they only see a 3% decrease in speed with their HBAs when comparing a "regular" server to a Hyper-V VM. So, the upgrade in physical hardware will make the VM perform much faster.

Here are some references that I would recommend reading prior to Hyper-V deployment:
http://download.microsoft.com/download/8/1/5/81556693-1f05-494a-8d45-cdeeb6d735e0/HyperV_Deploy.doc

http://technet.microsoft.com/en-us/library/cc732470.aspx

If you want to maximize performance on the Hyper-V server, the following is a great document: http://www.microsoft.com/whdc/system/sysperf/Perf_tun_srv.mspx (See Performance Tuning for Virtualization Servers)


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