Page 1 of 1

Max Amount of RAM for Operating Systems (WIP)

Posted: Mon Feb 01, 2016 5:21 am
by Shane
Since this information is starting to get removed from the official sources, I figured I'd compile it all here in case we need a reference while messing with legacy OSs. Of course, these are official limits. They can be surpassed by various means.

DOS-based Windows

Code: Select all

Windows 3: 512MB
Win9x Kernel

Code: Select all

Windows 95: 1GB
Windows 98: 1GB
Windows 98SE: 1GB
Windows ME: 1.5GB
NT Kernel

Code: Select all

Windows NT: 4GB
Windows 2000 Professional: 4GB
Windows 2000 Server: 4GB
Windows 2000 Advanced Server: 8GB with PAE enabled
Windows 2000 Datacenter Server: 32GB with PAE enabled
XP Versions

Code: Select all

Windows XP Starter: 512
Windows XP Home: 4 GB
Windows XP Media Center: 4 GB
Windows XP Tablet PC: 4 GB
Windows XP Professional: 4 GB
Windows XP 64-bit: 128 GB
Windows Professional x64: 128 GB
Vista Versions

Code: Select all

Windows Vista Starter IA-32: 1 GB
Windows Vista Home Basic IA-32: 4 GB
Windows Vista Home Basic x64: 8 GB
Windows Vista Home Premium IA-32: 4 GB
Windows Vista Home Premium x64: 16 GB
Windows Vista Business IA-32: 4GB
Windows Vista Business x64: 128GB
Windows Vista Enterprise IA-32: 4GB
Windows Vista Enterprise x64: 128GB
Windows Vista Ultimate IA-32: 4 GB
Windows Vista Ultimate x64: 128 GB
Windows Server 2003: 4GB
Windows Server 2003 Enterprise Edition: 32GB
Windows Server 2003 Datacenter Edition: 64GB