Gaussian 03 on AMD Athlon 64

[Douglas Sievers <dsievers{at}ucla.edu>]

 Hi CCLers,
I am planning to build a workstation with an AMD Athlon 64 Processor
 (3400+ to be specific). My university has a site-license for Gaussian
 03, but we do not have the source code (at least I do not believe we
 do).
I have binaries available for Intel and AMD 32-bit architecture under
 Linux. Supposedly, the Athlon 64 processors can run 32 bit and 64 bit
 applications. I was wondering if anyone has had experience running
 32-bit Gaussian binaries on one of these 64-bit(32-bit compatible)
 systems.
I am not so much worried about optimizing performance of Gaussian, as
 I
 am in the operability of GaussView and Gaussian itself. I am planning
 to
 run the calculations on a separate cluster, unless they are small or
 test calculations that could be handled by a single CPU efficiently.
Please include what OS you are using in the reply. I would likely
 choose
 Fedora Core 1 for AMD64 as my platform, although I am open to
 suggestions for alternatives.
 Thank you all!
 Doug Sievers
 dsievers{at}ucla.edu