On Paul Leventis' info that the VPR Benchmark (Part of SPEC) is an FPGA Place and Route program I went and looked at a few results at
The interface is hideous, but I managed to ferret out a few results:
2.0 GHz Opteron time 115, score 1215 2.0 GHz Athlon 64 time 127, score 1102 2.2 GHz Athon XP (32bit) time 182, score 768 3.2 GHz Xeon (1MB cache) time 129, score 1085I started out looking for a 32bit Athlon vs. 64bit, but couldn't find any exact matches on a GHz vs. GHz, but the slower 64bit cpu's trounced the 32 bit XP's even given its faster clock.
Interesting also that the super Xeon couldn't best the Opteron even with over a GHz clock advantage. So if VPR is any indication then a 64 bit AMD system looks very promising.
Ken