Well, here's the run-down.
I went back to fry's, and had them swap out a lot of hardware. At first nothing worked, and they even had the same issue on another brand new board and i7. At some point, we got a random CMOS checksum error, and it started to boot after that with 1 stick of fry's cheap DDR3 RAM @ 1.5v in the 2nd slot (white, closest to CPU). From that point afterwards, we were able to add sticks to the 4th slot, and then the other two (blue) last. Now it will post with all the slot populated. Now I know full well how touchy some boards can be about how the DIMMs are populated; but before this it wouldn't POST with 1 stick in ANY slot....just those rapid beeps.
Not sure what happened here, as the first board definitely wouldn't post or even spin up, so I know that for sure was a bad board.
As of now, the system is booting with 2x1gb G.skill DDR3 1600s (1.65v). I'm at the end of my tether tonight, so I'll be putting windows 7 on it tomorrow night. We'll see if it's still working properly by then.
I have a sneaking suspicion that until they tried posting the board with one stick of RAM that runs @ stock 1.5v, it messed with the BIOS maybe, trying to boot w/those G.Skills @ 1.65v first? I'm grasping at straws, but unless the board came with a jacked BIOS, then I can't think of anything else it could be.
It doesn't explain the rapid-fire beeping, esp. since I still get that w/no ram...what happened to the old school memory-issue post beeps? Like the one they say to look for in the new manual even, the ones we should be getting?
Eitherway, thanks for the help and input from everyone here on trying to solve this wacked problem. I'll keep this thread updated and let you know how the system checks out as I complete this build.
Specs:
Core i5 750
GB P55-UD3R
2x1Gb G. Skill DDR3 1600 (prefer OCZ, but they were out of stock, or way overpriced)
XFX 4890 1Gb
Corsair 750w
CM Storm Scout (fantastic case BTW)
The usual junk for the peripherals and drives. Nothing special there.
Win7, if I can get this copy to install right this time!