I bought 4X8GB 3600Mhz Corsair Dominator RAM (linked below) a few months ago and they overclocked to 4000Mhz with the original C16-18-18-36 timings. I had to bump the voltage up from it's default voltage of 1.35v to 1.39v and set it to 4000Mhz and I was all set. It's passed all stress tests and had no real world performance problems. I found the same 32GB kit on Amazon for $500 but it looks like it's sold out everywhere and is no longer listed on the Corsair site. That's probably why this set it is so priced up at the moment. Temps are between 35C and 38C even under prime 95 torture test. It's a great set of RAM if you can find it at sane prices somewhere and with only 16GB it should cut the cost in half. If you get lucky you might find it for $250 to $280 somewhere.