@FiNAS I didn't say the result will blow up the performance, but as you mentioned you're interested in the 2-4% on performance boost, so am I. In this case I disagree with your statement, that it's meaningless to oc the RAM and that you wouldn't notice the difference/improvement. Look at the fps from Cinebench. I mean there is an improvement in ca. 6fps from 2000MHz NB -> 2770Mhz & 1600Mhz -> 2000Mhz RAM. (compared third and second lines) [OpenGL] or even just by setting the RAM freq higher (last 2 lines) gives us ca. 2fps more. I personally think it's a good improvement.
Nevertheless, everyone has his own opinion, and the actual discussion here goes in a wrong way. ^^
P.S.: I also think it's better to oc the CPU itself first and generally leave the NB and RAM alone, without any exp. of overclocking. But his RAM was tested at 1866Mhz, so there must be a profile in the BIOS, according to that RAM. It makes the whole thing easier.