So looks like its mostly cpu bound, now Im at boost 1418mhz (default 3d base 1279mhz) and I almost got 17500 points like my "max" gpu OC above with 17560. What I did was raise VCSSA, while lowering cpuV a bit, above tests were with 4.7Ghz @ 1.285v and vcssa 0.100, now cpuv @ 1.272v and vccsa 0.190v+ offset (real ~ 0.990v).