maximum memory supported by Windows 7
Windows XP Professional x64 edition supported up to 128GB and when it was released, some motherboards could be populated to that amount, so all was fine. Vista x64 was released and kept the same limit, even though motherboards have evolved, so even though scRGB support was offered in Vista, I just waited to see what would happen with Windows 7. A dual-processor Nehalem EP motherboard can support 288GB, and some software like Panorama Factory can handle over 128GB with no issue, as not constrained by the "famous llp64 ecosystem". WS2003 (same codebase as XP x64) had up to 2TB support but I want a workstation OS with all the associated support and task optimization (drivers, application software compatibility, etc...) Please advise. Thanks !
February 15th, 2009 10:02pm

I would assume that Windows 7 x64 will have the same limitations as Vista x64. Server 2008 Enterprise can support up to 2TB. If you want a workstation class OS to operate with workstation performance, then you will need to get workstation class hardware that has full, 64bit driver support. If you get the proper hardware, then you will have no issues. If you really, really want a WindowsOS that will not limit you in any way, whatsoever when it comes to utilizing maximum memory, then Server 2008 x64 Enterprise is your choice; however, it will cost you $$$$$$$$$$$$.99.
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February 15th, 2009 11:49pm

I would assume it would be based on a non-server edition most likely the same as vista. Version Limit in 32-bit Limit in 64-bit WindowsVista Ultimate 4 GB 128 GB WindowsVista Enterprise 4 GB 128 GB WindowsVista Business 4 GB 128 GB WindowsVista Home Premium 4 GB 16 GB WindowsVista Home Basic 4 GB 8 GB WindowsVista Starter 1 GB Not applicable Taken from Memory Limits for Windows Releases
February 16th, 2009 12:11am

The cost is not an issue for me, yet I want an OS that's optimized for a workstation (in terms of services execution quanta, etc...) with a decent driver ecosystemand that's the reason I am not getting WS2003 or 2008 ;hopefully your assumption proves wrong and there is some innovation 6 years after the first XP x64 beta in terms of supporting dual processor motherboards from 2008.I noticed that WS2003 went from 1TB to 2TB after SP2.
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February 16th, 2009 5:43am

Microsoft has yet to officially announce the memory limitations of each edition of Windows 7.-Nick
May 26th, 2009 4:18am

I would suggest because of moore's law, these limits by now should be doubled or quadrupled.The number of total cores was quadrupled from 64 to 256.
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May 26th, 2009 4:48am

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