Paul,
If you'd ask me, I would say that you can't just mangle with clock speeds and clock resolution and more (stepping stuff) unlimited and regardless Mobo and processor.
Personally I don't recognize at all what you are saying, but my MoBo is a different one.
In the far end I am thinking about how OS clock resolution can - or actually should be related on the "clock edges" of the hardware. So, something like 1400MHz should fit 50000 Hz (that Clockres of 0.5ms). At least that is what I would investigate with strange effects. And then not fit it exactly, but de-fit it (the more close fit but not 100% the more resonance occurring).
Uh-oh ... now what will happen to you all ?
(I stay out of trying
)
Peter