Superior Windows XP x64 Edition (64 bit)
Windows XP x64 supports up to 128GB of RAM !
This Windows version is designed to work with 64-bit processors from AMD and
Intel that support the x64 extensions to the x86 architecture. These include
Athlon 64, Athlon 64 FX, Mobile Athlon 64, Turion 64, Opteron processors from
AMD, and all Xeon, Pentium 4, Dual, Quad & 8 Core Intel setups with EM64T.