I'm out... Difficulty is very too high now...  I've mining 5k YAC in 5 min at launch with the same 3930K, so now i'm not ready to mine for 50YAK/day... 
There is some people with 65k kh/s of power on http://yac.dontmine.me/    It's a little unfair... lol

But good luck all and have a nice weekend