Hello,
Consider it this way.
There is ESX which is now 64bit and requires 64 bit hardware
and
There are 64 Bit VMs, which still require Intel-VT or AMD-V extensions to run within ESX.
There will most likely be a new CPUID ISO you can run to verify your hardware.
Best regards,
Edward L. Haletky
VMware Communities User Moderator, VMware vExpert 2009
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Author of the book 'VMWare ESX Server in the Enterprise: Planning and Securing Virtualization Servers', Copyright 2008 Pearson Education.
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