Keith.
you're correct with htt and htr - send and receive.

I'm using F4 bios so here's my voltages

CPU-VID 1.3, NB-VID 1.3, NB-CORE 1.165, and I have CPU-HT 1.162.
I did change my NB-VID from 1.25v to 1.3v for stability.
These are according to AOD 2.0.17.

We need to test the same chip in a different board. Did Dave say he was getting a K9A2?
I've got a Gigabyte 780G but that's useless really as it has no overclocking options. (HTT + CPU volts)