Look at this score.
Yes, its a Quad at 5Ghz, but its also getting a 7500 point CPU score. I think a 3.8Ghz could maybe get 5800-6000 points. Im not joking.
EDIT: ...looking at the 3.6Ghz scores (~5500), I think 6k is a bit much...but still. Its feasible to get a sick score! Go for it!
I got cpu score of 5316 with a QX6800 @3.38 on air with a zalman 9700 everything unlapped