You will notice a lot of space. This is because we focused on optimal cooling so that we can get the highest CPU speeds without thermal throttling. The 4 case fans on the front push cool air through the case and forces heat out the rear. The CPU cooler originally had only two fans in a push setup. Under stress testing it was found that thermal CPU voltage throttling was happening, so I added two more fans to the cpu cooler radiator for a push/pull setup and this solved the thermal throttling problem and success...we have managed to cool this beast of a CPU that is known to be difficult to keep cool. The CPU cooler static pressure fans push a lot of air through the radiator operating between 4,000 RPM - 6,900 RPM, depending on load. Under the highest stress tests we are able to sustain core boost frequencies without the CPU throttling down its CPU voltage. Its rock solid on all tests and there has been zero crashing or instability. Very happy with the build overall and glad everything worked out for our first HG owned server