Win10，Win7,WinServer2012,WinServer2008内存最大支持

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关于64位Windows7的信息已经很全面了，但是关于win8和win10最大支持多少内存信息很少且可靠性较低，假设不考虑主板等方面的限制，单纯考虑操作系统对内存容量的支持。
Physical Memory Limits: Windows 10

The following table specifies the limits on physical memory for Windows 10.

Version	Limit on X86	Limit on X64
Windows 10 Enterprise	4 GB	2TB
Windows 10 Education	4 GB	2TB
Windows 10 Pro	4 GB	2TB
Windows 10 Home	4 GB	128GB

Physical Memory Limits: Windows 7

The following table specifies the limits on physical memory for Windows 7.

Version	Limit on X86	Limit on X64
Windows 7 Ultimate	4 GB	192 GB
Windows 7 Enterprise	4 GB	192 GB
Windows 7 Professional	4 GB	192 GB
Windows 7 Home Premium	4 GB	16 GB
Windows 7 Home Basic	4 GB	8 GB
Windows 7 Starter	2 GB	N/A

Physical Memory Limits: Windows Server 2012

The following table specifies the limits on physical memory for Windows Server 2012. Windows Server 2012 is available only in X64 editions.

Version	Limit on X64
Windows Server 2012 Datacenter	4 TB
Windows Server 2012 Standard	4 TB
Windows Server 2012 Essentials	64 GB
Windows Server 2012 Foundation	32 GB
Windows Storage Server 2012 Workgroup	32 GB
Windows Storage Server 2012 Standard	4 TB
Hyper-V Server 2012	4 TB

Physical Memory Limits: Windows Server 2008 R2

The following table specifies the limits on physical memory for Windows Server 2008 R2. Windows Server 2008 R2 is available only in 64-bit editions.

Version	Limit on X64	Limit on IA64
Windows Server 2008 R2 Datacenter	2 TB
Windows Server 2008 R2 Enterprise	2 TB
Windows Server 2008 R2 for Itanium-Based Systems		2 TB
Windows Server 2008 R2 Foundation	8 GB
Windows Server 2008 R2 Standard	32 GB
Windows HPC Server 2008 R2	128 GB
Windows Web Server 2008 R2	32 GB

原文地址：https://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx