"The biggest difference seems to be with respect to WinRAR, where for our 450+ second test the 2666 C11 kit performed 22 seconds faster than a 2400 C10 kit. If that 5% change can be justified in the price for what you do, then this kit could be for you."
Ian Cutress - Anandtech
G.Skill F3-2666C11D-8GTXD review by Anandtech - Introduction & Conclusion.
