That's the recommended with the CPU at stock, the 4770K can run basically out there on the market - I run 32GB of 2666 with my 4770K, and have run up to 32GB of 2800. I generally recommend a minimum of 8GB 2x4GB 1866/9 with Haswell...withthe Sabertooth would suggest either the GSkill Trident or their Snipers