First, thank you for your quick answers, I'm sure you once knew the feeling of anxiety of not knowing what to do with a certain situation.
However, after going into BIOS and manually setting the voltage to 1.6v (from 1.5v that the MOBO had set as default), my problem remains.
-The timings that came with the RAM are 9-9-9-24 1.60V 1600MHz.
-I manually set the BIOS to match these specs and once again, there is absolutely no problems posting, BIOS picks up all 12 GB.
-I tried the same set up with the XMP profile enabled and disabled.
I had to double-check and I do indeed have 64 bit Windows. Even now, I'm typing this to you from the rig with 6GB of RAM installed. Perhaps I'm "doomed" to only run 3 physical DIMMs.
(On a side note, when I tried to use OC Genie, it actually underclocked my CPU to around 2.4GHz? I'm wondering if there is a side effect issue from the RAM?)