I think it your memory.
I have a friend who has a epox 8kda3+ and Kingston valueram and Hyper x and it don´t work.it crash all the time.
so if you can get some other
ram from a friend and test.
Ocz /a-data/Crucial Ballistix/geil should work.
and for
vcore is normal that it jump up and down by 0.1 to 0.15v idle /load.
sorry for my bad English