140mm frame types
NF-A14 & NF-P14s redux: Square 140mm frame
The square 140mm frame of NF-A14 and NF-P14s redux with 140mm mounting holes (124.5mm spacing) makes them a premium grade replacement for common 140mm case fans and perfect for use on 140mm water cooling radiators, where the square shape will ensure full coverage and best pressure performance.
NF-A15: Round 140mm frame with 150mm width
The NF-A15 is tailor-made for use on today’s high-end CPU coolers: While its 150mm width matches those of most high-end heatsinks, its 140mm height doesn’t make it extend on top and thus ensures best case compatibility. The NF-A15’s standard 120mm mounting holes (105mm spacing) also make it an ideal performance upgrade for 120mm case or CPU fans.
NF-P14r redux: Round 140mm frame
Using a round 140mm frame with the same hole-spacing as common 120mm fans and producing more airflow due to its larger diameter, the NF-P14r is a perfect upgrade for 120mm CPU or case fans.