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ESXi & 64-bit CPU questions

fred2k3 asked
Last Modified: 2013-11-11

I have installed ESXi 4.0 on a HP Proliant DL380 G4 server. Unfortunately I don't know if the processors are 32 bit or 64 bit. Does anyone know the easiest way to find out for certain? (The BIOS doesn't seem to mention anything about the architecture)

I have installed Windows 7 (32-bit) on a VM and from the registry HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 it looks like it's 32-bit.. but I don't know if I should trust this since the VM has been told to set up the machine for 32-bit Windows.

I tried installing 64-bit Win 7 and got a message saying it was incompatible with the CPU, but having already installed other 32-bit O/S on the same datastore I wasn't sure whether this perhaps had any baring on the matter... which leads to my second question...

Is it possible (and if so, advisable) to install both 32bit & 64bit O/S on the same datastore? Are there likely to be any adverse affects?

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