Windows Server Memory Limits

The table below describes the physical memory limits supported by each Windows version. We want to make sure our clients are aware of these limits as we begin to offer increased amounts of RAM across our server platforms.

Server Version 32-Bit 64-Bit
Windows 2003 Standard R2  4 GB  32 GB
Windows 2003 Enterprise R2  64 GB (PAE)   1 TB
Windows 2008 Web  4 GB  32 GB
Windows 2008 Standard  4 GB  32 GB
Windows 2008 Enterprise  64GB (PAE)  1 TB
Windows 2008 Datacenter  64GB (PAE)  1 TB
Windows 2008 Web R2  n/a  32 GB
Windows 2008 Standard R2  n/a  32 GB
Windows 2008 Enterprise R2  n/a  1 TB
Windows 2008 Datacenter R2  n/a  1 TB
Windows 2012 Datacenter  n/a  4 TB
Windows 2012 Standard  n/a  4 TB
Windows 2012 Essentials  n/a  64 GB
Windows 2012 Foundation  n/a  32 GB
Windows 2016 Datacenter  n/a  24 TB
Windows 2016 Standard  n/a  24 TB
Windows 2019 Datacenter  2 TB  24 TB
Windows 2019 Standard  128 GB  2 TB
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