What is the maximum RAM that Windows XP Pro x64 support?

I wanna know what is the maximum RAM supported by Windows XP x64.
Help!

Windows XP x64 supports up to 128GB of RAM, so don't worry about it and install as much RAM you can!!
All the Best!:thumbup1:

128 GB?? wow! i thought it would be somewhere near 16GB. Anyways thanks man! Thanks for your help!

x64 i.e : 64-bit operating system have to be installed in huge machines and have to take a gigantic amount of load! (lot of multitasking) So the memory support is greater! Thought you would like to know! anyways, Keep posting!

manufacturer made it possible to apply more memory .
(32-bit = 2 32 = 4,294,967,296, 64-bit = 2 64 = 8,446,744,073,709,551,616)
for 64bit Virtual memory:-16 terabytes; Paging file size :-256 terabytes.

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http://forums.techarena.in/reviews/1100523.htm