even then my 8800gts is 18 points shy of 16k exacly. i am on a quad, btu ive seen 4ghz plus duels boost a score liek you wouldnt beleive. also im only @ 3.6 so yea your cpu at that speed is botlenecking also ati is beter in 3dmarks 06, with a good cpu oc i expect high 16s low 17's also you might wana increase your gpu oc. because its not just my cpu score that is teh cause of this, look @ my sm2.0 and hdr/sm3.0
so try to get to 4.5 sounds resonable and you should get teh score you deserve. on a siden note zmatt your desktop makes me feel a litle more normal knowing im not the only messy one, i rearange them to but everytime i boot up there moved i dont get it.