Thermal flow intake the cool air through the front two 120mm cooling fans and exhaust the hot air out by the top 140mm fan hdd rack up to three 3 5 drives and one 2 5 drives hdd rack can be removed to make more room for the high end graphics cards when you remove the hdd rack the back can mount two 3 5 drives or 3 5 2 5 drives for each one compatibility vga card length 285410 mm cpu cooler height 160mm psu length 160mm support integrated water cooler pc 18 designed to