Aagh, I may have just found the problem. Looking at the MSI compatibility list on their website more closely, the OCZ3G13334GK is listed, but not the OCZ3G1333LV4GK. The paper instruction manual says nothing specific about voltage, but their website mentions only 1.5v RAM. So, the problem is most likely based off the fact I'm an idiot instead bought the low voltage RAM (stupid $15 mail in rebate tricked me). Seeing as the first OS install problems were solved by manually changing the voltage in the BIOS, I'm pretty sure this is it.