It took some time for be quiet! to jump in the AIO liquid CPU cooling trend so for that exact reason they launched the Silent Loop line with not one but 3 different products in it, a single fan 120mm model and two dual fan 240mm/280mm models. Obviously although the single 120mm model and the dual 240mm model use one and two 120mm fans respectively the 280mm model uses two 140mm fans which means its target audience is smaller compared to the other two.