You might also consider the trade-off between the following: 1) The availability of 64 bit drivers for your system 2) The possibility that you might want to use more than 4GB in the next three years. Some $500 server boards now support 128GB of RAM. 3) The move towards 64 bit only client software. That has already taken place in the server realm. I have a laptop that did not have a 64 bit video driver and so I had to revert to the 32 bit OS. My VM's though appear to work fine with 64 bit Windows 7. Laurence Bates _____ From: Jon Galbreath [mailto:[log in to unmask]] Sent: Friday, May 21, 2010 10:16 AM To: [log in to unmask] Subject: Re: [MSUNAG] Any Point to Creating a 64 Bit Win7 VM? My general thought for x86 vs. x64 depends on memory. If there's 3+GB, then I go with x64. If it's less than 3, I go with x86. Jon Galbreath MCSE/Security+ Systems Administrator International Studies and Programs Ph: 517-884-2144 [log in to unmask] From: Al Puzzuoli [mailto:[log in to unmask]] Sent: Friday, May 21, 2010 10:04 AM To: [log in to unmask] Subject: [MSUNAG] Any Point to Creating a 64 Bit Win7 VM? So, if I want to create a Windows 7 VM for use with Fusion on a Mac, should I create a 32 or 64 bit VM? I don't plan on giving the VM anywhere close to 4 GB of ram, so what other factors come into play? Does the host utilize more resources to run a 32 bit system Vs a 64 bit or vice versa? Thanks, --Al