Ripjaws X memory is 40mm tall, and the Hyper 212 EVO has fan clearance of 37mm, which would suggest the fan will be offset by about 3mm (which wouldn't even stick out as far as the ends of the heatpipes). However, that's not taking into consideration the different reference points - the memory presumably touches the motherboard pcb when fully inserted, but the cpu cooler is offset from the motherboard by the thickness of the socket and cpu, and I've been unsuccessful in finding specifications for the height/thickness from the motherboard to the cpu's ihs.