XPS 710 H2C QX6700 running hot

The processor temps in my system have increased from 28 c at idle and the mid to high 40's under load to 50c at idle and the mid to high 60's under load.  I noticed some dust clogging the intake of the H2C unit and vacuumed it off but it didn't improve the temps. Does anyone have any ideas? Temps taken with Realtemp.

XPS 710 H2C

QX6700 @ 3.3

4 gb Crucial Ballistix @ 667

EVGA 9800 GX2  @ 710 and 2230

24 " Samsung Flat Panel

Vista Ultimate x64