Windows XP build 3790.0
|Build of Windows XP 64-Bit Edition Version 2003|
Windows XP 64-Bit Edition build 3790 is the official RTM build of Windows XP 64-Bit Edition, Version 2003. This version adds support for the Itanium 2 processor and is based on the Windows Server 2003 codebase. Unlike x86 versions of Windows XP, it didn't have the Luna theme and runs x86 programs slower than native IA-64 programs.
This version of Windows XP 64-Bit Edition contains the Pinball game in a compressed package, and decompressing it gives a native IA-64 version of the game (albeit it may need to be debugged in the process).
Incomplete source code for this build was leaked in 2020.