The advent of the [[AMD]] [[Athlon 64]] iswas the first CPU to successfully bring 64-bit computing to the consumer desktop while providing compatibility with the [[IA32]] architecture. A 64-bit version of Windows XP for the Intel Itanium has([[IA64]] architecture) had already been made available. However, Microsoft has released aton [[April 25]], [[2005]] a new 64-bit version of Windows XP for users of the AMD Athlon 64 and [[Opteron]] processors as well as the AMD64|AMD-64-bit Intel [[Pentium 4]] and [[Xeon]] line of processors that contain Intel's EMT64 technology.architecture
(which includes AMD [[Athlon 64]] and [[Opteron]] processors, and Intel [[Pentium 4]] and [[Xeon]] processors with support for the [[EM64T]] extensions).
