By accelerating the air flow in the critical outer regions of the fan blades, suction-side vortex detachments are reduced, resulting in higher efficiency and lower turbulence-induced noise emission. The PWM fans lend themsleves better to being controlled by PWM cycles through your motherboard, rather than decreasing the voltage with, say, a fan controller. The only difference I can think of is that Founders' Edition cards might be higher-binned chips for enthusiasts, but you aren't using an aftermarket waterblock anyway.

The NF-A14 is a premium quality quiet 140mm fan with a square frame that complies with Noctua’s AAO(Advanced Acoustic Optimisation) standard. Like all Noctua fans, the NF-A14 has an MTBF specification of over 150,000 hours and comes with a full 6-year manufacturer's guarantee. Featuring sophisticated aerodynamic design measures such as Flow Acceleration Channels, the NF-A14 further improves the renowned quiet cooling performance of the iconic NF-P14. Both cables are fully sleeved and a 4-pin y-cable allows to connect a second NF-F12 fan to the same PWM fan header for automatic control.Optional coloured anti-vibration mounts - To complement the coloured anti-vibration pads included with the fans, users can purchase chromax line NA-SAV2 anti-vibration mounts that enable the convenient, quick and vibration-free installation of fans in standard mounting holes for case fans. For further customisation, a wide range of accessories such as coloured cables, additional anti-vibration pads and anti-vibration mounts are available separately. For refined colour coordination, white, red, blue, green and yellow 30cm NA-EC1 cables plus corresponding NA-YC1 y-cables are available separately.

Inside the box, there are multiple connections, to reduce fan speed, to extend the cable, or a two way adapter.I recently bought 7 of the a12x25 pwm fans for my case (nzxt switch 810) but am now wondering if it would be better to go with the NF-A14 instead. Stops at 0% PWM - When the fan is set to 0% PWM duty cycle by the motherboard or PWM fan controller, it will stop. Thanks to its thoroughgoing aerodynamic optimisations, the NF-A14 provides higher static pressure and an even better airflow/noise ratio than its much acclaimed predecessor. Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item.