essenbe. Really aids overall airflow through the case, drawing the air from the top front intake and guiding it cleanly out the exhaust. The bottom intake also helps with the graphics cards more than I thought it would. Recently I've been contemplating a custom loop to include the GPUs, as I'm not too keen on ramping up the fans on the graphics cards for extended gaming sessions, but what I'd lose by taking out the D15 in case airflow is really holding me back from wanting to do so.
My rig has outgrown it's case . Loose appendages everywhere. It's like the rig frankenstein built. Probably going to have to find something more suitable to house this build.