Actually they have more than five 7GHz CPU at HKEPC, this I am 200 % sure because I saw with my eyes. (i'm Christian Ney, from carpo93's laptop at Campus Party)
i have a GA-Z77X-UD3H stuck at 16x after a crash, but not with so high frequencies like you, at 5,8ghz 3dmark 06 cpu test, tried f10, f9 and f8 bioses but no solution
best core 6050mhz, worst core about 5400mhz (core5); for wprime 4 cores at 5390 and the worst at 5023mhz
win 7 is not the best, but it was just the first oc session with this chip, hope to get some spare time next week to bench it again:)