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

[Quack]

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

[Calvin K]

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!

[Quack]

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

[Calvin K]

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!

[karunakar]

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.

check this link
Kingston DDR3 Ram