SDRAM and platform usage

[PCER]

Good evening.

 

What amount of an SDRAM is taken by the software? For example, a 256GB FBD 667Mhz SDRAM running Windows virtualisation has what amount of the SDRAM left for the virtualised OSs?

[strawberry]

depends on the software and the os.

[Dos_Box]

Beware spammer!!

[PCER]

A Windows virtualisation platform or a linux virtualisation platform allowing for virtual OS systems. How much of the SDRAM would the virtualisation platform take up initially?