Ok thats interesting. So MSI is undervolting then from sensor....I just saw a post from someone saying their MSI board (GD45 I think?) was running at 1.32 idle and 1.38 load cpuz....
Anyway clear the cmos and see if your card is at X16 again.
I still think it's a RAM problem with your board or maybe you have a bad board. Most people I've seen in forums say the Gigabyte boards clock slightly higher than MSI series...so there is a compatibility issue with your system.
You don't have any 1.5v RAM to test?
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