? -Will this work as a CPU fan i5 core

It could, if the CPU radiator is designed to mount a "regular" 80mm case fan. Since this is a PWM fan, the CPU fan plug on the motherboard will drive it just fine, and the air flow should probably be high enough. But, having said that, this is designed as a case fan. CPU fans are typically large, with blades that have a lot of "bite", intended to move air volume at low RPMs. Case fans are designed to operate at higher RPM than CPU fans, and may even stall at very low RPM that a CPU fan can slowly spin at.

What is the mounting screw dimension hole center to center? I'm guessing it would be the same for all 80mm fans. Is there a chart somewhere that would provide this info for all fan sizes?

There isn't any information like what your asking for indicated on the OEM WEB site. It is the case/cooler OEM that specifies the range of the fan size/sizes to be used. There are fan size mounting adaptors' available if needed for certain situations . I am under the impression that they are all standard sized HxWxD. I hope this helps you out

Can I use this with dell precision tower T5810? Any help?

As long as your fans are 80mm this fan will work as three pin or four voltage adjustable three pin or pulse width modulated fourth pin I have never worked on a T5810 personally but looked it up on the net. You have to check the size of your fans 3 case or 1 cpu fans move a lot of air and are very quite you can hear it at full speed but not loud hope this helps.

How do I uninstall the fan?

you must check your blinker fluid before uninstalling the fan driver.

Super Flower, Cooldex ST4 ARGB CPU Air Cooler, 4 Copper Heat Pipes, Intel: 1851/ 1700 / 1200 / 1150 / 1151 / 1155 AMD: AM5 / AM4, White, SF-ST12P4-WH

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Noctua; NF-A8;Noctua NF-A8 PWM - Noctua.at

Noctua NF-A8 PWM, Premium Quiet Fan, 4-Pin (80mm, Brown)

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Model: PWM

PWM
ULN
5V PWM
5V

Premium quiet fan, 80x80x25 mm, 12V, 4-pin PWM, max. 2200 RPM, max. 17.7 dB(A), >150,000 h MTTF
Award-winning 80x25mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
8cm format is ideal for compact PC cases (HTPC, ITX, Small Form Factor) and other chassis (intake & exhaust), replacement fan for NAS and other devices, etc.
4-pin PWM version for automatic speed control via 4-pin PWM fan headers, broad 450-2200rpm speed range (1750rpm max. with supplied Low-Noise Adaptor)
Includes anti-vibration mounts, fan screws, Low-Noise Adaptor, extension cable and y-cable for running two PWM fans on the same header

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The NF-A8 is a highly optimised, premium quality quiet 80mm fan. Featuring Noctua’s AAO (Advanced Acoustic Optimisation) frame as well as sophisticated aerodynamic design measures such as Flow Acceleration Channels, the NF-A8 further improves the renowned quiet cooling performance of the award-winning NF-R8. The PWM version sports Noctua’s custom designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers and comes with a Low-Noise-Adaptor to reduce the maximum speed during PWM control from 2200 to 1750rpm. Its superb running smoothness, reference-class SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands.

Best Seller Ranking	#74 in Case Fans

Model
Brand	Noctua
Model	NF-A8 PWM

Details
Fan Counts	1 Fan
Fan Controller	No Controller
Type	Case Fan
Compatibility	CPU Cooler, Water-Cooling Radiator and Case
Fan Size	80mm
Fan Thickness	25mm
Bearing Type	SSO2 ( Self-stabilising oil-presure bearing )
RPM	2200 RPM ( standard ), 1750 RPM ( w/ L.N.A ), 450RPM (Mini Rotation Speed)
Air Flow	32.67 CFM (standard), 25.84 CFM (w/L.N.A.)
Noise Level	17.7 dB(A)/standard, 13.8 dB(A)(w/ L.N.A )
Power Connector	4 Pin
Color	Brown
LED	No

Features
Features	Succeeding the award-winning NF-R8 Noctua's NF-R8 fan has become a default-choice among PC enthusiasts looking for a premium quality quiet 80mm fan. Thanks to its thoroughgoing aerodynamic optimisations, the NF-A8 provides higher static pressure and an even better airflow/noise ratio than its much acclaimed predecessor. NF-A8 Flow Acceleration Channels The NF-A8 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise. NF-A8 AAO Frame Noctua's AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan's performance/noise efficiency. Stepped Inlet Design Noctua's Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space restricted environments. Inner Surface Microstructures With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency. Integrated Anti-Vibration Integrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard screws and other mounting systems.

Dimensions & Weight
Dimensions	80.00 x 80.00 x 25.00 mm

Package Contents
Package Contents	Low-Noise Adaptor (L.N.A.) 4-Pin Y-Cable 30cm Extension Cable 4 Vibration-Compensators 4 Fan Screws

Additional Information
First Listed on Newegg	July 31, 2025

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