Next we ran through our 3D Studio Max tests again but within the Windows XP Pro x64 environment.  Again, in these tests we'll can only compare the new P4 6XX series and Extreme Edition CPUs to their Athlon 64 counterparts, since these are the only chips capable of supporting 64-bit extensions.

3ds max 7 Rendering Test - 64-bit mode 3D Modeling and 3D Modeling with MP3 Encode Multitask

As you can easily see, 64-bit OS-based performance with this native 32-bit application is just slightly slower than the 32-bit version of Windows XP at this time on either processor architecture from AMD or Intel. Furthermore, the Pentium 4 Extreme Edition and Pentium 4 660 maintain their positions relatively in the performance spread for this test.