I installed esxi 4 update 1 on a blade server with two nehalem 5520 processors. I created a new vm to support 2008r2. When i started the installtion an error stated that no 64bit cpus where compatible. Please help
My dual Nehalem server works just fine
Xeon 55xx series proc's supports virtualization. There is something in your bios which isnt supporting it. Can you list the hardware you're using?
As stated above, this will be your BIOS that is failing to support VT, rather than your processors.
I would look at whether there is a firmware update applicable to your hardware.