We also ran a
series of benchmarks on only the Athlon 64 FX-51, using an
early beta release of Windows XP 64-Bit Edition. When
looking at these scores, please keep a few things in mind.
First, remember that the early version of Windows XP 64-Bit
Edition we used is nowhere near complete. When the
final product is released, it will most likely perform
differently than what you see here. Secondly, all of
the drivers we used were also immature. It will take
some time before 64-Bit device drivers catch up to their
32-Bit counterparts, in terms of stability and performance.
Lastly, the benchmarks represented on this page are all of
32-Bit applications, that are not optimized for the Athlon
64 architecture, being run in WoW64 emulation mode.
WoW64 translates 32-bit calls into 64-bit instructions.
However, because the Athlon FX-51 processor can also run
32-bit apps natively, it's not an "emulation" mode, in the
traditional sense. These scores are here only to show
you how Windows XP 64-Bit Edition performs today, in its
early stage of development with a few legacy applications.
Windows XP 64-Bit Edition: Benchmarks With
32-Bit Application: Synthetic DirectX Tests
The Athlon 64
FX-51's overall 3DMark2001 score dropped off sharply when we
ran the benchmark on the 64-Bit Edition of Windows XP, in
the neighborhood of 17%. We should also mention that
we were not using the same video drivers in this test.
The only 64-Bit Windows XP drivers we had available for our
GeForce FX 5900 Ultra at the time were v50.40. The
32-Bit score was obtained with the v51.75 Detonator FX
Windows XP 64-Bit Edition: Benchmarks With Quake
32-Bit Application: OpenGL Gaming
As you can
clearly see, performance in Quake 3 Arena was also much
lower on Windows XP 64-Bit Edition, but it's not because
there is a problem with the Athlon 64 FX-51 or this OS.
The cause of this low Quake 3 Arena score is the immature
v50.40 64-Bit NVIDIA graphics drivers. In their
current form, even though the option is available in the
driver panels, disabling V-Sync does not work. We've
included these scores only to solidify the point, that there
is still much work to be done with the 64-Bit version of
Windows XP and the drivers for it.
Windows XP 64-Bit Edition: Benchmarks With XMPEG
v5.02 Using DivX v5.1
32-Bit Application: Video Encoding
The Athlon 64
FX-51's video encoding performance with XMPEG also took a
hit when we ran it on the 64-Bit OS. Considering the
fact that the OS and drivers we used in this test were in
beta form and that XMPEG and the DivX encoder were both
running with WoW64 translating the calls, the 16.3% drop in
performance isn't all that drastic. As the 64-Bit
Windows platform matures, we fully expect all of these
scores to significantly increase.
Native 32-Bit vs. 64-Bit Tests