Ok, well my uncore is at its rated 2x DRAM speeds (2800MHz for me). The EE chips use a 6.2GT/s on the QPI. Looks like my QPI is actually low. It should be at 4.8GT/s. I will have to fix that when I get a chance. I may push it a bit further, but I don't think performance will improve that much from it.
It's just a simple multiplier change. For some reason I thought it was 3.2GT/s when I set it. I upped the voltage to 1.2V (up from default 1.1V) just to keep it stable, but I'm sure it's not having problems staying stable below its rated speeds.
EDIT: I must have been thinking of my default uncore speed, which is 3.2GHz.