Physical Memory Limits for Windows and Windows Server Releases

Every so often colleagues are coming to my room and asking me what is Windows maximum memory limitation for their home computers.

In this article I will cover the physical memory limits for Windows and Windows Server releases.

So, let’s get started:

Windows XP

32-bit (x86)
Windows XP Home: 4GB
Windows XP Professional: 4GB

64-bit (x64)
Windows XP Home: N/A
Windows XP Professional: 128GB

Windows Vista

32-bit (x86)
Windows Vista Starter: 1 GB
Windows Vista Home Basic: 4 GB
Windows Vista Home Premium: 4 GB
Windows Vista Business: 4 GB
Windows Vista Enterprise: 4 GB
Windows Vista Ultimate: 4 GB

64-bit (x64)
Windows Vista Starter: N/A
Windows Vista Home Basic: 8 GB
Windows Vista Home Premium: 16 GB
Windows Vista Business: 128 GB
Windows Vista Enterprise: 128 GB
Windows Vista Ultimate: 128 GB

Windows 7

32-bit (x86)
Windows 7 Starter: 2 GB
Windows 7 Home Basic: 4 GB
Windows 7 Home Premium: 4 GB
Windows 7 Professional: 4 GB
Windows 7 Enterprise: 4 GB
Windows 7 Ultimate: 4 GB

64-bit (x64)
Windows 7 Starter: N/A
Windows 7 Home Basic: 8 GB
Windows 7 Home Premium: 16 GB
Windows 7 Professional: 192 GB
Windows 7 Enterprise: 192 GB
Windows 7 Ultimate: 192 GB

Windows 8

32-bit (x86)
Windows 8: 4 GB
Windows 8 Professional: 4 GB
Windows 8 Enterprise: 4 GB

64-bit (x64)
Windows 8: 128 GB
Windows 8 Professional: 512 GB
Windows 8 Enterprise: 512 GB

Windows 10

32-bit (x86)
Windows 10 Home: 4 GB
Windows 10 Pro: 4 GB
Windows 10 Education: 4 GB
Windows 10 Enterprise: 4 GB

64-bit (x64)
Windows 10 Home: 128 GB
Windows 10 Pro: 2 TB
Windows 10 Education: 2 TB
Windows 10 Enterprise: 2 TB

Windows Server 2003

32-bit (x86)
Windows Server 2003, Standard Edition: 4 GB
Windows Server 2003, Enterprise Edition: 64 GB
Windows Server 2003, Datacenter Edition: 64 GB
Windows Server 2003, Web Edition: 2 GB
Windows Small Business Server 2003: 4 GB
Windows Storage Server 2003: 4 GB
Windows Storage Server 2003, Enterprise Edition: 8 GB
Windows Compute Cluster Server 2003: N/A

64-bit (x64)
Windows Server 2003, Standard Edition: N/A
Windows Server 2003, Enterprise Edition: 512 GB
Windows Server 2003, Datacenter Edition: 512 GB
Windows Server 2003, Web Edition: N/A
Windows Small Business Server 2003: N/A
Windows Storage Server 2003: N/A
Windows Storage Server 2003, Enterprise Edition: N/A
Windows Compute Cluster Server 2003: 32 GB

Windows Server 2003 with Service Pack 1 (SP1)

32-bit (x86)
Windows Server 2003 with Service Pack 1 (SP1), Standard Edition: 4 GB
Windows Server 2003 with Service Pack 1 (SP1), Enterprise Edition: 64 GB
Windows Server 2003 with Service Pack 1 (SP1), Datacenter Edition: 64 GB

64-bit (x64)
Windows Server 2003 with Service Pack 1 (SP1), Standard Edition: 32 GB
Windows Server 2003 with Service Pack 1 (SP1), Enterprise Edition: 1 TB
Windows Server 2003 with Service Pack 1 (SP1), Datacenter Edition: 1 TB

IA64-bit
Windows Server 2003 with Service Pack 1 (SP1), Standard Edition: N/A
Windows Server 2003 with Service Pack 1 (SP1), Enterprise Edition: 1 TB
Windows Server 2003 with Service Pack 1 (SP1), Datacenter Edition: 1 TB

Windows Server 2003 with Service Pack 2 (SP2)

32-bit (x86)
Windows Server 2003 with Service Pack 2 (SP2), Standard Edition: 4 GB
Windows Server 2003 with Service Pack 2 (SP2), Enterprise Edition: 64 GB
Windows Server 2003 with Service Pack 2 (SP2), Datacenter Edition: 64 GB

64-bit (x64)
Windows Server 2003 with Service Pack 2 (SP2), Standard Edition: 32 GB
Windows Server 2003 with Service Pack 2 (SP2), Enterprise Edition: 1 TB
Windows Server 2003 with Service Pack 2 (SP2), Datacenter Edition: 1 TB

IA64-bit
Windows Server 2003 with Service Pack 2 (SP2), Standard Edition: N/A
Windows Server 2003 with Service Pack 2 (SP2), Enterprise Edition: 2 TB
Windows Server 2003 with Service Pack 2 (SP2), Datacenter Edition: 2 TB

Windows Server 2003 R2

32-bit (x86)
Windows Server 2003 R2 Standard Edition: 4 GB
Windows Server 2003 R2 Enterprise Edition: 64 GB
Windows Server 2003 R2 Datacenter Edition: 64 GB

64-bit (x64)
Windows Server 2003 R2 Standard Edition: 32 GB
Windows Server 2003 R2 Enterprise Edition: 1 TB
Windows Server 2003 R2 Datacenter Edition: 1 TB

Windows Home Server

32-bit (x86)
Windows Home Server: 4 GB

64-bit (x64)
Windows Home Server is available only in 32-bit edition.

Windows Server 2008

32-bit (x86)
Windows Web Server 2008: 4 GB
Windows Small Business Server 2008: 4 GB
Windows Server 2008 Standard: 4 GB
Windows Server 2008 HPC Edition: N/A
Windows Server 2008 Enterprise: 64 GB
Windows Server 2008 Datacenter: 64 GB

64-bit (x64)
Windows Web Server 2008: 32 GB
Windows Small Business Server 2008: 32 GB
Windows Server 2008 Standard: 32 GB
Windows Server 2008 HPC Edition: 128 GB
Windows Server 2008 Enterprise: 1 TB
Windows Server 2008 Datacenter: 1 TB

IA64-bit
Windows Server 2008 for Itanium-Based Systems: 2 TB

Windows Server 2008 R2

32-bit (x86)
Windows Server 2008 R2 is available only in 64-bit edition.

64-bit (x64)
Windows Web Server 2008 R2: 32 GB
Windows HPC Server 2008 R2: 128 GB
Windows Server 2008 R2 Standard: 32 GB
Windows Server 2008 R2 Foundation: 8 GB
Windows Server 2008 R2 Enterprise: 2 TB
Windows Server 2008 R2 Datacenter: 2 TB

IA64-bit
Windows Server 2008 R2 for Itanium-Based Systems: 2 TB

Windows Server 2012

32-bit (x86)
Windows Server 2012 is available only in 64-bit edition.

64-bit (x64)
Hyper-V Server 2012: 4 TB
Windows Storage Server 2012 Standard: 4 TB
Windows Storage Server 2012 Workgroup: 32 GB
Windows Server 2012 Foundation: 32 GB
Windows Server 2012 Essentials: 64 GB
Windows Server 2012 Standard: 4 TB
Windows Server 2012 Datacenter: 4 TB

Note: Although each version of Windows has its own limit on the amount of RAM it will support, so do the many CPU/motherboard combinations found in PCs both old and new. Therefore, just because your particular Windows version supports a certain amount of RAM, your computer’s CPU/motherboard might support more or less than that amount.

I hope that this article helped you to understand the physical memory limits for Windows and Windows Server releases. Feel free to share your thoughts about this article using the comments section below or catch us on Twitter.

Nik

Experienced IT Consultant working and living in the UK. In early years he was born and raised up in Greece and been to the UK since studies. He is passionate with technology, gadgets and computers, he really likes the internet and IT in general.

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