As far as benchmark goes, overclocked cpu from 3.0 to 3.6 and vid card from 750/900 to 800/950 and score jumped from 1468 to 2682 high.
And as far as the beta goes, i've been running it at 1920x1200 with all the options off, shadows on average (medium) and it runs smooth. Only around 30-40fps...