In recent months, Noctua have been consistently churning out excellent CPU coolers to suit almost every eventuality.  Their entire line has been revamped and made compatible with all the latest CPU sockets and many of them have been given a push/pull fan configuration to squeeze every last drop of performance from your CPU.  One of Noctua's major plus points is the inclusion of their high quality fans, after testing various different models and sizes, we all agree that they are some of the finest available.Recently, we reviewed the rather good NH-U12P SE2 and the performance was excellent, but Noctua have raised the bar again, enter the NH-D14.  Today, we'll be taking an in-depth look at the NH-D14 and comparing it to its most popular rivals, the Prolimatech Megahalems, Thermalright Ultra Extreme 120 and the Noctua NH-U12P SE2.As with its smaller siblings, the NH-D14 features push/pull fans, but the twist in the tail here is that it also features a dual radiator design which houses a 140mm fan in the centre plus a 120mm fan on one end, and unsurprisingly, this makes it an extremely large and bulky heat sink.  So, on paper, this looks like it could be the cooler that many of us have been waiting for, but how does it really perform?  Read on to find out...