Blend test stresses CPU + NB + Memory. SmallFTT stresses mostly the CPU, because data is all stored and used from cache. Large FTT is a combination of both. If you are failing SmallFTT, increase the cpu voltage, I would start with your VID. Use Core Temp 0.99.3 to find your VID.
that is your memory right? under the specification tab, it is rated to run at 1.8v at 9-9-9-24 with no problem so it should be 100% safe. the reason why i suggested you up ur mem voltage, is large FFTs stresses the ram and i think they could be undervolted, especially if you're going to OC. try 1.8v and see how it goes.