I am aware XP is unable to address > 4GB of memory. I am doing this because I plan to eventually install Vista 64 bit which should be able to address this memory. Do you know of any problem other than the limitation mentioned in having 8mb installed in XP?Thank you kindly,Noel

There should be no downside, other than what you mention (*XP not at all using the additional memory).

>I am aware XP is unable to address > 4GB of memory. I am>doing this because I plan to eventually install Vista 64 bit>which should be able to address this memory. >>Do you know of any problem other than the limitation mentioned>in having 8mb installed in XP?>>Thank you kindly,>>NoelXP is unable to address more than 2GB actually. Or if I should be really precise, not more than around 1,3GB per thread (application) under 32bit.

What do you make of this Word Not Allowed?I'm pretty sure I read with the /PAE switch certain windows 32-bit OS' could access up to 4GB, and that with XP SP2 the OS defaults to enabling Physical Address Extension to access addresses in the higher memory registers. I'm not certain of the limitations of using this feature and I think there are some, but it's interesting anyway. Below the narrative is a section describing maximum memory for each OS: http://www.microsoft.com/whdc/system/platf...PAE/PAEdrv.mspxIntroductionPAE is an Intel-provided memory address extension that enables support of greater than 4 GB of physical memory for most 32-bit (IA-32) Intel Pentium Pro and later platforms. This article provides information to help device driver developers implement Windows drivers that support PAE.Microsoft supports Physical Address Extension (PAE) memory in Microsoft Windows 2000, Windows XP, and Windows Server 2003 products: Operating system Maximum memory support with PAE Windows 2000 Advanced Server 8 GB of physical RAM Windows 2000 Datacenter Server 32 GB of physical RAM Windows XP (all versions) 4 GB of physical RAM* Windows Server 2003 (and SP1), Standard Edition 4 GB of physical RAM* Windows Server 2003, Enterprise Edition 32 GB of physical RAM Windows Server 2003, Datacenter Edition 64 GB of physical RAM Windows Server 2003 SP1, Enterprise Edition 64 GB of physical RAM Windows Server 2003 SP1, Datacenter Edition 128 GB of physical RAM