When I had a set of Corsair XMS3 CL9-9-9-24-41-2T 1.65v 2x2gb Kit, at those speeds I was able to acheive 1900mhz on them with my 1055T's NB @ 2860mhz
If you want to go for a breakneck OC, drop the command rate to 2T, and push em. if you want a cooler, longer lasting OC, drop them into 1333 and push for 7-7-7-24-33-1t or better.