Eric
As far as the RAM. I keep trying to say that. All the game FPS tests show faster RAM doesn't allow more that a couple of FPS and is frequently less stable than 1333 or 1600 RAM.
Literally about 3 FPS max difference between slow and fast RAM.
Sorry

that is not the case - fast RAM is as stable as slow RAM I have 2400Hz running side by side with 1600Hz and that are both Stable and there are no reports anywhere that fast RAM is NOT stable.
IMHO, using slow RAM on a fast OC'd cpu is like running a slow video card on the system ie changing a 780 for a 650 or similar. Memory management in Haswell needs fast RAM so that it can feed the very fast cpu with the data it needs to process. It may only be a minor gain in performance (fps is NOT an indicator of RAM/cpu performance) but it could increase smoothness when the system is under load. Its all about balance.
On a Sandybridge/Ivybridge system I would use 1600Hz RAM but on Haswell at least 2100Hz. Just an opinion.
Still if it works with lower RAM go for it as computers are strange beasts.