>While in general there may not be that much of a % difference between the 2 chips, >there's a huge gap in Postgres. For whatever reason, Postgres likes Opterons.
>Way more than Intel P4-architecture chips. It isn't only Postgres. I work on a number of other server applications that also run much faster on Opterons than the published benchmark figures would suggest they should. They're all compiled with gcc4, so possibly there's a compiler issue. I don't run Windows on any of our Opteron boxes so I can't easily compare using the MS compiler.