微軟官方網頁下載點
http://www.microsoft.com/windowsxp/...on/upgrade.mspx
System Requirements:
• Supported processors: AMD Athlon 64, AMD Opteron, Intel Xeon with Intel EM64T support, Intel Pentium 4 with Intel EM64T support

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看來WndowsXP 64bit上市日期不遠了
支援Intel EM64T指令集的Pentium4處理器應該也會隨XP 64bit同時期正式上市.