As more and more projects are adding support for x86-64, if you're interested, I made one such client available at boinc_5.4.11_x86_64-pc-linux-gnu.gz (note that it's been gzip'ed).

HTH

The new AMD64 client, version 5.8.11, for Linux can be found at boinc_5.8.11_x86_64-pc-linux-gnu.tgz and for Windows, by Crunch3r, at boinc_5.8.11_windows_amd64.zip.

For more updates, go to this thread.

HTH

thanks, tested it and working well..

on Gentoo Linux 2.6.20 SMP Opteron 165 at 2850Mhz and 2x1GB of RAM

2007-03-26 19:07:12 [---] Benchmark results:
2007-03-26 19:07:12 [---] Number of CPUs: 2
2007-03-26 19:07:12 [---] 3107 floating point MIPS (Whetstone) per CPU
2007-03-26 19:07:12 [---] 7546 integer MIPS (Dhrystone) per CPU

The new AMD64 client for Linux and Windows can be found in this thread.

HTH