May I just add to this.

I have a two machine setup one system Intel quad core QX6700 running @2.8, 4 gigs ram.

second system AMD FX60, 64, running @2.7, with 4 gigs ram.

Without being technical it HAMMERS the dual core., In comparison renders it is on average 70+% faster. period. On Poser 7, or any other package that sees more than one processor.

On one test the quad had finished rendering before the dual had even started.!!!

Be under no illusions quad core processors give unrivelled and definate performance gains.