Guys,
I bought this board and it's been a dream so far. I bought a new graphics card and now I'm having an odd problem - here's the situation.
I am watercooling my CPU. I put the board in, went into BIOS without doing any settings research on here, and overclocked to 4.0 Ghz (the same as I had been running on my old motherboard).
I simply changed the vcore, changed the RAM volts, FSB (400), ratio (10), disabled spread spectrum and all features on the CPU config page, set the ram ~800, turned off Mem OC charger.

I tested it and it was prime stable (blend and cpu only), 3dmark stable, games stable.

Yesterday, I bought a 4870 X2 and stuck it in. Computer would not post until I pulled out the power cord, put it back in, and restarted. It posted at reduced settings.
I took it to default settings and it booted no problems. I tried OC'd settings again and it failed. Next time, I tried only changing the minimum number of settings to achieve 4 ghz, leaving all the "extra" features on,
but I gave it some extra volts on the motherboard voltages. It booted no problem. I then put back the original OC'd settings, but with the higher voltages. It did not post. I went back in and turned on the 2 spread spectrum settings.
It posted, and I put the motherboard voltages back to stock, and it still posted. It passed all stability tests, although it felt perhaps a tad sluggish to me. I noticed also that it had scored 200 points lower on the CPU portion of the 3dmark test than it had with the old graphics card.

What's going on? This makes no sense to me - I've never heard of the graphics card affecting the overclock. Does anyone have any suggestions that might be useful, or insight as to what could be going on here?