http://blogs.msdn.com/b/virtual_pc_guy/archive/2009/08/27/requirements-and-limits-for-hyper-v-in-windows-server-2008-r2.aspxWe recently updated the TechNet Library wit the details of the limits and requirements for Windows Server 2008 R2.&#160; You can read about it here: http://technet.microsoft.com/en-us/library/ee405267(WS.10).aspx As a side note, we are constantly updatingen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/virtual_pc_guy/archive/2009/08/27/requirements-and-limits-for-hyper-v-in-windows-server-2008-r2.aspx#9899632Fri, 25 Sep 2009 21:17:18 GMT91d46819-8472-40ad-a661-2c78acb4018c:9899632Thao Vuong<p>Why Why ?</p> <p>I tried to get hyper V running on my dl380 G4 and could not as it reports my chipset does not support it.</p> <p>So I try to run Virtual Server 2005 R2 SP1 and found out it will not run on Windows 2008 R2.</p> <p>So what can one do. &nbsp;VMWARE?</p> <p>Is there a virtual server 2005 option for Windows 2008 R2?</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9899632" width="1" height="1">http://blogs.msdn.com/b/virtual_pc_guy/archive/2009/08/27/requirements-and-limits-for-hyper-v-in-windows-server-2008-r2.aspx#9888564Fri, 28 Aug 2009 18:44:52 GMT91d46819-8472-40ad-a661-2c78acb4018c:9888564Tony B<p>Just wondering... with Hyper-V Server or Windows Server 2008 Core I believe Microsoft recommended leaving 512MB memory available for the base OS plus about 64MB per VM running. &nbsp;Is that correct? &nbsp;Do these numbers change for R2?</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9888564" width="1" height="1">