BLCK number times the ram multiplier is your ram speed. Overclocking is generally trial and error. Your best bet is to do some reading and go from there. Keep voltages within specs and QPI/Dram (or maybe it's called QPI/VTT depending on the board)and your dram bus voltage within .5 or less of each other. For example 1.65 dram voltage would mean the QPI/dram needs to be at least 1.15.
That chip is pretty speedy at that frequency, I can't say more than that unless you have a target your trying to reach.