Windows OS Memory

By Charles O. Lucas (K@g3/$h@d0w)

I made some notes on Memory for windows OS and NOS operating systems. Memory maximums for current Microsoft® Windows OS’s include:

32-bit OS

Windows 8 (32 bit)

• Windows 8 Enterprise: 4 GB
• Windows 8 Professional: 4 GB
• Windows 8 Home: 4 GB

Windows 7 (32 bit)

• Ultimate: 4 GB
• Enterprise: 4 GB
• Business: 4 GB
• Home Premium: 4 GB
• Home Basic: 4 GB
• Starter: 2 GB

Windows Vista (32 bit)

• Ultimate: 4 GB
• Enterprise: 4 GB
• Business: 4 GB
• Home Premium: 4 GB
• Home Basic: 4 GB
• Starter: 1 GB

Windows XP (32 bit)

• Professional: 4 GB
• Home: 4 GB
• Starter Edition: 512 MB

Windows Server 2003 (32 bit)

• Datacenter SP2: 128 GB
• Enterprise SP2: 64 GB
• Standard SP1: 4 GB*
• Datacenter R2: 128 GB
• Enterprise R2: 64 GB
• Standard R2: 4 GB*
• Web Edition: 4 GB*
• Small Business Edition: 4 GB*

Windows Server 2008 (32 bit)

• Datacenter: 64 GB
• Enterprise: 64 GB
• Standard: 4 GB
• Web Server: 4 GB

* Certain Microsoft server operating systems can support over 4GB of memory via Physical Address Extension (PAE). Please refer to the Microsoft knowledgebase article located here for more information.

64-bit OS

Windows 8 (64 bit)

• Enterprise: 512 GB
• Professional: 512 GB
• Home: 128 GB

Windows 7 (64 bit)

• Windows 7 Ultimate: 192 GB
• Windows 7 Enterprise: 192 GB
• Windows 7 Professional: 192 GB
• Windows 7 Home Premium: 16 GB
• Windows 7 Home Basic: 8 GB
• Windows 7 Starter: N/A

Windows Vista (64 bit)

• Ultimate: 128 GB
• Enterprise: 128 GB
• Business: 128 GB
• Home Premium: 16 GB
• Home Basic: 8 GB

Windows XP (64 bit)

• Professional: 128 GB
• Windows Server 2003 (64 bit)
• Datacenter SP2: 2 TB
• Enterprise SP2: 2 TB
• Standard SP1: 32 GB
• Datacenter R2: 1 TB
• Enterprise R2: 1 TB
• Standard R2: 32 GB
• Small Business Edition: 128 GB

Windows Server 2008 (64 bit)

• Datacenter: 2 TB
• Enterprise: 2 TB
• Standard: 32 GB
• Web Server: 32 GB

Windows Server 2012 (64 bit)

• Datacenter: 4 TB
• Standard: 4 TB
• Essentials: 64 GB
• Foundation: 32 GB
• Storage Server 2012 Workgroup: 32 GB
• Storage Server 2012 Standard: 4 TB
• Hyper-V Server 2012: 4 TB

This article will updated when I have time. If your work with Windows 95, 98, ME or Windows 3.1 or 3.11, and there will newer versions of windows.

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