To make sure my ESX hosts are VMotion compatible, I normally use the cpuid.iso found on the ESX install CD, to boot from and write down all cpu info. Its a bit of a pain, because you can’t redirect the output to file or floppy, so you really have to write it down on a piece of paper.
Last week I read a tip that you can also create a VM, mount the iso and then boot from it. Because ESX gives full access to the cpu, the info presented is equal to the info when booting the host itself from this iso. Now you can use the remote console to see all cpu info, maybe even make a printscreen or type it into notepad.