Okay, got it figured out, not too hard if there is a fix on your motherboard - Asus mobos sometimes have a "mem-okay" button which attempts to fix that kind of issue.
Here is the issue (I did a little research).
It is a compatibility issue. The Ram chips you have installed (probably good in their own right) on your mobo are not listed on the motherboard's QVL (Qualified Vendor List). Using ram which isn't in the QVL will not necissarily cause bad things to happen but (as it seems in your case) it can.
Two options here;
1) If your mobo has a "mem-okay" button, use it, see if you stabilize
or
2) Replace with ram from the QVL list
About the QVL: The QVL usually takes up a great portion of your motherboard's manual Those products listed (exactly to model number - gotta check ALL those letters and numbers) are guaranteed to work properly with that motherboard. There may be a number of reasons a product is not included (unavailable to test, unstable, stable but run too hot, etc...) so just because it isn't on the list doesn't mean it won't work, it's just not guaranteed to.