Hi Theoretical. :welcome:
GA-Z97-HD3 rev 1, 2 or 2.1?
Did you seat the two sticks in ddr3_1 and ddr3_2 ?
I.e., in the grey slots?
(2nd slot and 4th slot, starting from the cpu)
Are you doing overclocking?
Try to remove msi afterburner, then go to the bios settings, select load optimized defaults and save the settings.
There's also a newer bios (F9, I wouldn't use the BETA version F10c).