Turns out I need to but the switch iPresentInterval=0 in Skyrim.ini, not SkyrimPref.ini. Or may be needed to be in both... :-)
The frame rate now varies between 170fps (That's right 170) to 32fps.
If I look up the sky or a wall inside a house, frame rate goes up to 170fps
The most graphic intensive place in Whiterun, at the stair of Dragon's Reach looking down over town and valley, frame rate is still at 33fps
Out in the wild, it varies between mid 50fps to 80fps. Some place it goes down near 40fps.
This is with both cards OC to 1.2V/925MHz , Mem clock at 1400MHz. Fan set to 50% (kind a noisy). Both card runs around 75C and both are near 99% load. BTW, CPU (i5-2500K) OC to 4.3GHz.
I'll set them back to factory settting later tonight and see how they do in crossfire. But this is great!... :-)