Assassin's Creed is much smoother with a quad over the dual...
I can run 4.2 Ghz on my E3110, but some games noticably UT3 games were still smoother with the quad. Assassin's Creed uses a custom engine but it's tuned for multcore, as seen here the dual was 85 - 90% util all the time, the quad much lower but all 4 cores are used. When in cities with lots of NPCs there is a huge difference, quad is much smoother.

I'm headed back to my quad after alot of benching fun with the E3110. Games are smoother on the quad.

E3110 @ 4.1Ghz -


Q6600 @ 3.4Ghz -