Sorry for late reply…
Would all of the ram default to the slowest speed, if I have diff speeds? Is 16000 a significant performance jump? On a side note, I don’t often see a 12gb system…it’s usually 8, 16, 32gb etc. Any issues with going 4gb x2 + 2GB x2?
I’ll look into going up to 16000. I just wanted a lil performance nudge…and didn’t really want to spend over $100. I was unaware (until JUST now) of the significant ram price increases since my last build 1.5 years ago 
I’ve OC’d past systems before and may look into that also.
THANKS!! 