http://blogs.msdn.com/b/virtual_pc_guy/archive/2010/06/17/increased-number-of-virtual-machines-supported-in-a-cluster-hyper-v-r2.aspxWhen we released Windows Server 2008 R2 we stated that we would support up to 384 virtual machines running on a single instance of Hyper-V – but only up to 64 virtual machines running on a node of a cluster. Last week we announced that we now supporten-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/virtual_pc_guy/archive/2010/06/17/increased-number-of-virtual-machines-supported-in-a-cluster-hyper-v-r2.aspx#10033424Thu, 01 Jul 2010 14:07:56 GMT91d46819-8472-40ad-a661-2c78acb4018c:10033424Big Monstro<p>Sorry to be out of topic... But I&#39;ve got a big question about memory in Virtual PC (version 2004/2007). Virtual PC 2004 doesn&#39;t run on Windows 64-bit host and Virtual PC 2007 for Windows 64-bit host is still a 32-bit program. Despite that fact, Virtual PC 2004 and Virtual PC 2007 are designed to handle 3.6 GB per virtual machines (see manual), even on 32-bit hosts without PAE support. But to my acknowledge, a 32-bit application cannot manage more than 2GB (or sometimes up to 3GB thanks to LARGEADDRESSAWARE). Because Virtual PC 2004 and 2007 are single-thread applications, I don&#39;t understand how they are able to handle more than 3GB for all virtual machines at the same time. How is it possible ? Thank you</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10033424" width="1" height="1">