Looks similiar to some of the rebranded IC that XFX was using on their GPU for a while.. resistance for mod points on those was typically near 1k, requiring 20k for mod.
pic for reference - http://homepage.ntlworld.com/peter.jones107/8800gs-01.JPG
RTL training was fixed a couple BIOS back as well... *issue was with setting RTL manually along with secondary delay.
good to see MSI! .. sure hoping for some more profiles than that on public release though
with only vcore causing the issue.. i would lean towards this being CPU related, and not a characteristic of the mobo.
*interested in hearing more from you after testing different CPU or same CPU in different mobo..