Jimb086,

Yes, you need a 64-bit OS to address the 8GB of ram within your machine -- 32 bit simply cannot do so. If you plan to download Windows 7 RC 64-bit, please be sure to do so before August 15th as it will no longer be available after that date. For further support, Microsoft does have an official Windows 7 RC Support Forum located here http://tinyurl.com/9fhdl5 . It is supported by product specialists as well as engineers and support teams.

Jessica
Microsoft Windows Client Team