The Ripjaws 4 series offers speeds from 2133MHz all the way up to an impressive 3333Mhz. They feature medium profile blue, black, or red aluminum heat spreaders with a total memory module height of 40 mm. Not all heat spreader colors are available in all speeds and latency configurations. Their 40mm height should clear most aftermarket air cooler, but it is best to check first, before you purchase either. They are available in quad channel kits and with capacity configurations of 16GB and 32GB.