AHHH!!! This is REALLY freakin' me out.

Ok, so here are my POS... err I mean PSU stats:

+-------------------------------------------------------------------------+
|vCore | 1.76 V | 1.68 V | 1.84 V | 1.76 V |
|+3.3 | 3.23 V | 3.18 V | 3.33 V | 3.25 V |
|+5.00 | 4.87 V | 4.60 V | 4.92 V | 4.80 V |
|+12.00 | 12.80 V | 12.61 V | 13.25 V | 12.85 V |
|-12.00 | -12.80 V | -13.25 V | -12.61 V | -12.85 V |
|-5.00 | -5.33 V | -5.52 V | -5.25 V | -5.35 V |
+-----------------------------+----------+----------+----------+----------+

I don't know why, but sometimes my computer will restart, or freeze, then give me an "Keyboard error, or no keyboard found" error. Then after a while, if I restart it a bunch of times, it will eventually work. WHY DOES IT WORK SOMETIMES, BUT NOT OTHERS?! It generally works after I move around the PSU cables. I have a Logitech Cordless Elite Duo, and when it's giving me this error, the LED lights on the base don't light up when the USB cable is plugged in, but it WILL light up when it's not plugged in. Weird. What do you all think?

Looks like heavy fluctuation going on, which is bad. It's very well possible that this is also causing the instability.

I'd simply replace the PS unit or try unhooking unneeded devices to see whether the current load is causing the unit to cave in.

that works sometimes, but not all the time.

This is weird. Should I worry about my motherboard?