I have to agree with others in regards to the idiotic approach of many design, not by any means just corsair, to bring air in from the top instead of using it as exhaust.
On my 1080ti rig I added a 2nd 200mm fan to the top and also reversed both to act as exhaust. I then made sure the front, bottom fans are intake and the CPU and rear are also exhaust. Doing this allows a near effortless avg of 2012MHZ+ on the GPU/50-55c/70-75% fan and a CPU that rarely hits 60c @ 4.2ghz. All in a room that's around 72-74 Fahrenheit.
On the 1080SLI rig I had to get a little more complicated since they and the 4930k put out significantly more heat. A single 200mm on top(exhaust), 120mm rear exhaust), CPU pushing to rear, 4x 120mm on side controlled via NZXT intake directly across from both GPU's and CPU, and 200 mm front(intake). Only problem I've had there is that during the warmer months I have to take the cover off the mobo side to allow more exhaust air flow. This is in a room that will get upwards of 80 Fahrenheit. Doing this allows 65-72c on the GPU's doing 2000mhz with the 4930k holding 4.20ghz and ~60-65c respectively.