Some feedback on a X58 motherboard (X58A-UD3R): 2100 mhz is a no go, tried 11-11-11-30, 1,4v vtt, 1,60v ram. Will boot but crashes within 2 hours of folding. Currently testing 2000, 10-10-10-27. The problem seems to be the multipliers: i can only use 6x or 10x. The others wont even post. I tried to go back to 133 blck and up the ram. 1866 (14x) would not post, at any voltages i tried. Went back to using bclk to oc. It is quite harder, i think, to oc them on x58. I'm stuck on using 19x, 21x or 23x as cpu multiplier. If 2000 doesn't work, it'll leave me with 23x as my only option. Will continue testing today.