We also ran a
series of tests using some AMD supplied benchmarks that are
native to both 32-Bit and 64-Bit versions of Windows XP on
the Athlon 64 FX-51 test system. Unlike the tests on
the previous page, these benchmarks were run in native
64-Bit mode, not under WoW64 emulation. All of these
benchmarks have been optimized for AMD64, but please keep in
mind that they are still in their beta forms. Once
again, we show you these scores only to give you an idea of
the kinds of performance levels that are theoretically
possible, when using optimized 64-bit code on the Athlon 64
FX-51. The 32-Bit tests were run on Windows XP SP1.
The 64-Bit tests were run with a beta release of Windows XP
Benchmarks With Mini-GZIP
Optimized Version of ZLIB
benchmark measures the performance of an AMD64 optimized
version of ZLIB, versus a standard, unmodified 32-bit
version. Using both the 32-Bit and AMD64 optimized
versions, we compressed and then decompressed a single 25MB
text file. The scores below reflect the amount of time
(listed in seconds) that it took to complete the processes.
optimized 64-Bit versions of the Mini-GZIP benchmark gave
the Athlon 64 FX-51 a huge performance gain.
Compressing a 25MB text file with the 64-Bit version took
less than half the amount of time as it did on the 32-Bit
version. The same held true for the decompression
process. Don't expect to see 100% performance gains if
and when some of your favorite apps are re-compiled and
tweaked for native 64-Bit operation though. We're sure
some applications will run faster, maybe much faster, but
expecting gains this large is not completely realistic
Benchmarks With STREAMS
Sustainable Memory Bandwidth In High-Performance
This next test
is derived from the STREAM: Sustainable Memory Bandwidth
in High Performance Computers benchmark developed by
John D. McCalpin, Ph.D. Like the other tests on this
page, the STREAMS benchmark in still in its beta form.
This benchmark consists of a single executable file which is
run from the command line. The important results are the
transfer rates listed in MB/s in the first column to the
32-BIT VERSION - WINDOWS XP SP1
64-BIT VERSION - WINDOWS XP 64-BIT EDITION
benchmark didn't show the same kind of performance gains as
the Mini-GZIP tests did. The Copy and Scale processes
were actually a tiny bit faster on the 32-Bit version of
Windows, but the Add and Triad processes were a bit faster
with the 64-Bit version. The performance deltas
between the different processes on the different platforms
are minuscule, however.
Benchmarks With RSA Security Benchmarks
Code Optimized for AMD64
benchmarks consist of a two sets of executable files that
measure the performance of
key generation cryptography routines. The 64-bit executables
use RSA code that has been optimized for the AMD64 platform.
The 32-bit executables have also been optimized for AMD64.
We ran the tests on the Athlon 64 FX-51 in both the 32-Bit
and 64-Bit editions of Windows XP.
SCORES LISTED IN SECONDS
The 64-Bit RC4
and AES-128 Encryption routines, showed large performance
gains versus their 32-Bit counterparts but the 64-Bit
Triple-DES routine was only slightly faster than the 32-Bit
version, outpacing it by a fraction of a second.
Performance with the decryption routines was very similar,
with the 64-Bit versions beating out the 32-Bit versions
across the board.
Some Overclocking & The Conclusion