I fired up Photoshop and used the SkyEffects KPT6 plugin as a benchmark (very CPU intensive plugin - it renders a horizon and sky with clouds). The old P3-1000 system took 11.5 seconds to render a scene.
Same size scene with same settings on the new system took 6.3 seconds.
WOOHOO!
I always said I never like to upgrade until I can double my processing power, and it sure looks like I near did just that.
Happy.... happy... joy... joy!
