The Definitive Guide to Windows Supported Memory

In support of my blog on Development and Virtualisation, below is a guide to the maximum supported memory configuration for the current range of Windows Operation Systems.

Windows Server 2008 (32-bit)

OS	Maximum Physical Memory	Hot Memory Support
		Add	Replace
Web Edition	4GB	No	No
Standard	4GB	No	No
Enterprise	64GB	Yes	No
Datacenter	64GB	Yes	Yes

 

Windows Server 2008 (x64)

OS	Maximum Physical Memory	Hot Memory Support
		Add	Replace
Web Edition	32GB	No	No
Standard	32GB	No	No
Enterprise	2048GB	Yes	No
Datacenter	2048GB	Yes	Yes
Itanium	2048*	Yes	Yes

* Uses IA64 RAM

 

Windows Server 2003 (32-bit)

OS	Maximum Physical Memory
Web Edition	2GB
Standard SP2	4GB
Standard R2	4GB
Enterprise SP2	64GB
Enterprise R2	64GB
Datacenter SP2	128GB*
Datacenter R2	128GB*

* Requires Intel PAE

 

Windows Server 2003 (x64)

OS	Maximum Physical Memory
Standard	32GB
Enterprise	2048GB
Datacenter	2048GB

 

Windows Vista (32-bit)

OS	Maximum Physical Memory
Home Basic	4GB
Home Premium	4GB
Business	4GB
Enterprise	4GB
Ultimate	4GB

 

Windows Vista (x64)

OS	Maximum Physical Memory
Home Basic	8GB
Home Premium	16GB
Business	128GB
Enterprise	128GB
Ultimate	128GB

 

Windows XP (32-bit)

OS	Maximum Physical Memory
Home	4GB
Professional	4GB
Media Center	4GB

 

Windows XP (x64)

OS	Maximum Physical Memory
Professional	128GB