Microsoft Knowledge Base Article 826447 contains the following summary:
This article outlines the support policy for using 32-bit
Windows XP with the Advanced Micro Devices (AMD) Opteron
processor.
Microsoft Product Support Services will support x86-based
Windows XP Home and Professional versions when they run on AMD Opteron-based
systems. The level of support for Windows XP on specific hardware is determined
by the following criterion:
| • | Whether the hardware and drivers have completed the
Microsoft Hardware Logo Program -or- |
| • | Whether the hardware is listed on the Hardware Compatibility List (HCL) |
To download the latest Windows HCL, visit the following Microsoft Web site:
http://www.microsoft.com/hcl/default.asp
For additional information about the support of non-HCL hardware, click the following article number to view the article in the Microsoft Knowledge Base:
255036 Microsoft Support Policy on Hardware Not On Windows NT HCL
Note the following about AMD64-based systems:
| • | AMD64-based systems can run both 32-bit versions of Windows and any 32-bit application that is supported by x86-based systems. |
| • | 32-bit versions of Windows on AMD64 cannot execute 64-bit code. Running 64-bit code requires a 64-bit operating system. |
| • | AMD64 processors cannot run Microsoft Windows XP 64-Bit Edition for Intel Itanium processors. The differences in architecture between the two processors prevent each from running Windows XP compiled for the other one. |
