Physical Memory Limits Windows Server | ram limitations windows servers

Memory Deal » Memory Limits Windows Server	Thursday, July 24, 2008
What are the physical memory limits on a Windows server ?

32-bit or 64-bit ? More bits equals lower limitation on physical memory in your Windows server

The limit of physical memory that is supported on any computer system or server that runs the Microsoft® Windows® operating system is determined by the hardware configuration and the edition of Windows in use. On 32-bit hardware, the virtual address space is 4 GB and the maximum amount of physical memory ranges from 4GB to 128GB. With 64-bit hardware, the virtual address space is 16 terabytes and the maximum amount of memory ranges from 64GB to 1 terabyte

Limits on physical memory in a server for 32-bit platforms also depend on the Physical Address Extension (PAE), which allows 32-bit Windows systems to use more than 4GB of physical memory.

Physical Memory Limits: Windows Server 2008

The following table specifies the limits on physical memory for Windows Server 2008. Limits greater than 4 GB for 32-bit Windows assume that PAE is enabled.

Version	Limit in 32-bit Windows	Limit in 64-bit Windows
Windows Server 2008 Datacenter (full installation)	64GB	2TB
Windows Server 2008 Datacenter (Server Core installation)	64GB	2TB
Windows Server 2008 Enterprise	64GB	2TB
Windows Server 2008 Standard	4GB	32GB
Windows Server 2008 for Itanium-Based Systems	Not applicable	2TB
Windows Web Server 2008	4GB	32GB