64-bit guest OS on 32-bit host OS => usable RAM?

Question

I've read that you can run a 64-bit guest OS on a 32-bit host OS through virtualisation (Hyper-V or sth. similar).

How much RAM can the guest OS use/allocate in this case? (assuming 4GB+ RAM)

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Michael B. · Answer 1 · 2010-03-18 15:18:10Z

up vote 1 down vote accepted

Your Guest OS can't access more Memory than your Host OS.

answered Mar 18 '10 at 15:18

	added an image - so the RAM is managed by the host OS and not by the Hypervisor? – Milde Mar 18 '10 at 15:23
	@Milde The memory is Managed by the OS at the software Level, so the Guest can't have more memory than the Host. – Michael B. Mar 18 '10 at 15:26
	ty, I marked the answer as "the correct answer". I also figured out, that that you need a 64bit system to run Hyper-V on it. :) – Milde Mar 18 '10 at 15:41

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