Much like mechanical drives and solid state drives regular CPU air coolers are nowhere near to be replaced by the rather new in comparison AIO (all in one) liquid CPU coolers. When the first "serious" AIO models made their appearance just over a year ago some of us did think that it wouldn't take long for that to happen but since to date AIO models haven't really achieved much higher cooling performance compared to high-end CPU air coolers it will obviously take longer for that to happen (if of course something new and better comes along until then). Because of that it doesn't really come as a surprise that there are many manufacturers out there that still focus in the design and manufacture of CPU air coolers one of which is Scythe and today with us we have their latest Ninja 4 model.