Big thing will be if your CPU can handle it, give them a try at 2133 with the timings at 10-11-10-28, 1.55 to 1.6, if they will OC to that it's a small increase performance wise, then could try tightening it down to 9-11-10-28, that would be even better, if it takes a CL of 11 to run at 2133 then it's not worth it, will have better performance at 1866/9