ATI HD 4890 1GB CrossFire - AMD Phenom II 955 BE vs Intel Core i7 920
 

If we're considering a gaming system - you saw the graphics
and prices. With clear continence we recommend the platform based on
AMD Phenom II 955 BE. The processor provides more performance in the
system without overclock and the platform is cheaper, however we know
for a fact that it falls behind Core i7 920 in other professional and
general application such as video, audio and file compression,
rendering, etc. Where's the catch? If you are overclock enthusiasts
and want to squeeze the maximum out of your system, you should know
that it's normal to squeez around 50% from i7 920 but its rarely
possible to get more than 15-20% overclock on Phenom II 955 BE with
air cooler

http://www.modreactor.com/english/Re...re-i7-920.html