How much RAM does Windows XP support?

[logicbunni]

Ah, yes. The motherboard does. But what about Windows?

Here's a list of how much RAM the various Windows versions and editions support (as of Nov 2004):

Windows NT 4.0: 4 GB
Windows 2000 Professional: 4 GB
Windows 2000 Standard Server: 4 GB
Windows 2000 Advanced Server: 8GB
Windows 2000 Datacenter Server: 32GB
Windows XP Professional: 4 GB
Windows Server 2003 Web Edition: 2 GB
Windows Server 2003 Standard Edition: 4 GB
Windows Server 2003 Enterprise Edition: 32 GB
Windows Server 2003 Datacenter Edition: 64 GB

http://support.microsoft.com/kb/555223

[ImaNihilist]

Thanks for answering a question from 2005, with an answer from 2004, in 2009.

Weird.

[nihil]

Interesting though? last I heard MS were touting 3.12Gb not 4.0. Reminds me of their 9x/ME days when you were supposed to be able to use 2Gb of physical memory...........but God help you if you installed more than 512Mb

And nobody mentioned that your video card is included? In 2009 a 1Gb vid card is not unusual?

[James]

Interesting though? last I heard MS were touting 3.12Gb not 4.0. Reminds me of their 9x/ME days when you were supposed to be able to use 2Gb of physical memory...........but God help you if you installed more than 512Mb

And nobody mentioned that your video card is included? In 2009 a 1Gb vid card is not unusual?

You are confusing usable with supported. Windows 32-bit et. al. supports up to 4GB of RAM. However the user will only be privy to roughly 3.0-3.25GB of that, due to OS overhead and memory mapping.