Maximum ram supported by windows xp

32 bit, will see a bit under 3.5 gig, 64 bit will run whatever your motherboard maximum is.

I think it varies by processor/memory controller, and of course, your motherboard when it comes down to it. Then there is that ugly fact that a 2x8GB kit costs around $800 if both your processor and motherboard support it.

Some Nehalems max at 24GB -- a few of the SB processors spec 32GB max. XP-64 will get you 128GB maximum.

1- 3.5GB for x86
2- 128GB for x64

But keep in mind that the chipset also has a limit.

For more info check the link: http://msdn.microsoft.com/en-us/library/aa366778(v=vs.85).aspx

The processor don't determine the amount of ram it is determined by the operating system & motherboard as a 32 bit operating system can only use 4 GB where a 64 bit can use as much as the motherboard allows.

Sorry -- I'm not very comfortable with this.

The processor, motherboard and operating system all have an impact.