Talk:Windows XP Professional x64 Edition: Difference between revisions

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Windows NT 5.2?
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The article refers to 32 bit Windows being constrained to 4 gb RAM - but, if memory serves, SP1 introduced a 3 gb limit. Am I wrong? [[User:62.107.208.113|62.107.208.113]] 17:15, 23 October 2006 (UTC)
:This is an answer without references and it's been awhile since I've cared about this kind of minutae, so go look it up. But: NTOS normally creates a 4gb virtual address space. This is mapped to whatever real memory+virtual memory you have. Within this space, 2gb is for kernel mode, and 2gb is for user mode. Since there is no direct mapping to real memory, this division is fine... until now when machines have 4gb of memory and for all intent, there is nearly a 1:1 relationship to real memory. Prioritizing 3gb for user mode/1gb for kernel mode is a performance trade-off. afaik, this option was present in Win2000, but maybe my memory is faulty. Go look it up, but I think that's the answer you want. This also doesn't get into things like 48 bit memory addressing (PAE) modes on 32 bit x86. [[User:SchmuckyTheCat|SchmuckyTheCat]] 20:43, 23 October 2006 (UTC)
 
== Windows NT 5.2? ==
 
I believe I read that Windows XP x64 carries the identification Windows NT 5.2. However, [[Windows NT 5.2]] redirrects to Windows Server 2003. Should there be a disambiguation page, or am I mistaken about this? --[[User:Tech Nerd|Tech Nerd]] 04:29, 25 January 2007 (UTC)