Sorry for the Confusion of HT Link and CPU-NB. CPU-NB is the Integrated Memory Controller and will increase the effiency of the Memory!
The HT Link is the Hypertransport Link which links the cores together and the CPU to the Chipsets. 2000Mhz on the HT Link actually provides enough bandwidth for the cores to communicate amongst themselves as well as with the chipsets. But there has been Mildly noted improvement with 3D Applications....
I've ran my HT Link and CPU-NB both @ 3003Mhz Before, Stably! SO it's possible. Whther or not it's beneficial is another story.....
Hope this helps!
I ment my cpu-NB, can't get it past 2200
but I found out one of my memory sticks is bad, on memtest 4.0 it fails on the 2nd test 5 times no matter what settings I run, 800, 1066, 1333, 1600 with all types of timings including auto =\\
I figured out which stick it is, will have to wait tell I have extra cash to replace it hten get back to OCing