I'll just add, if you really use your system you'll notice a marked difference in the higher DRAM freqs, any time I drop any of my rigs to 1600 I can see a big difference, I normally build for clients w/ 1866 as a minimum...and don't believe all the foolishness about having to do all this fiddling with the DRAM and higher freqs, as long as your CPU can support it (the mobo plays in but very little, most any can deal with up to 2800-3000 in the Z87 chipset, but the CPU is the prime factor, locked non-K models are basically limited to what they can run, with say a 4670K you can generally run up to at least 2666 by simply enabling XMP and selecting profile 1, same with the 4770K up to 2800-3000. The OC that is generally on a mobos specs next to the freqs it supports means a CPU OC may be required to run the sticks at their native freq - You aren't OCing the DRAM - that's what is designed to run at...OCing DRAM is if you take say a set of 1866 and run it at 2133. Just thought you might want facts not conjecture