A lot of things can be happening.....For example uncore, mem divider, vtt. You're kind of overclocking the cpu old school plus adding on top of that the memory controller junk.
It takes time to find that sweet spot that the cpu works well with the gpu's. Like Nate and I found that our 920's worked the best at a blk of 217. Didn't matter if we went up over 220 cause it produced no returns.
You'll get there....it usually take about 365 days of sleep deprivation, lol!