Well, just saying, the 5800K actually surprises me greatly..
Well, I have overclocked the IGP(mainly because overclocking the CPU seems useless in my opinion plus it sits @4ghz automatically..)
But, mainly, 1ghz IGP (like a boost to 1.3v @ NB) and 2133mhz rram should be suffice
I just highly recommend that the motherboard supports the ram, it may be XMP or AMD...XMP thing, hopefully.
I am just not 100% sure about asus boards anymore, :x-not saying they are bad its just, the low end ones....idk..
I will say however, the APU does fair nicely at whatever ram speed you have set (or atleast for me)
Direct X games make the most noticable difference, but OpenGL...not so much.
And lastly, I do not see what people comment on about the aburd power draw. I do about 150~ or so, and i dont feel heat coming from my system at all, its kinda disapointing becuase i liked when my PC was a space heater