The thing is that my Corsair sticks wont do any better than Cas 9 1600, and Cas 10 1866, even though they only need 1.3v for Cas 9 1600 Mhz. They work at T1 though, and neither setting them to T2, nor increasing the voltage makes them any better.
The only 4 Gb sticks around that look to be better are the highly expensive black G Skill ripjaws, or the 2000 Mhz vengeance kit, and I dont want those because of the price and how much the value on my ram has gone down now.
I have no idea if these Crucials would manage any better either, so it would be too much of a gamble, and they might not even manage Cas 9 and T1.