Would this fan work on asus k31bf. fan really noisy and rattling of late. would i need 3 pin or 4pin if it does fit?

Hi, We are not so sure it will fit into your case, assuming it uses the usual 120mm or 140mm fitting, it should be ok. This cooler requires a 4 pin connection. Hope this helps Thanks, Ebuyer Team

What dimension are the fixing hole centres?

Mounting hole spacing: 71,5x71,5 mm

Does this fan have a flow direction arrow on the case?

Yeah, all fans are the same. They all spin counter clockwise and open side is intake.

I have a Dell Optiplex 9010 with a 5 pin fan, can I use a 5 pin to 4 pin adapter with this fan?

Noctua 12V fans comply with the established specifications for standard PC systems issued by Intel and AMD. Systems from Acer, Apple, Dell, HP, Lenovo or other major brands often deviate from these specifications e.g. by using proprietary fan headers, custom pin-alignments or pin-configurations, different methods of fan speed control, etc. This can lead to compatibility issues when using Noctua fans in systems from said brands. Some of these problems can be avoided with some technical knowledge, but especially BIOS related issues (e.g. errors or shutdowns due to low fan speed) can often not be resolved. As a result, Noctua does not officially support systems from Acer, Apple, Dell, HP, Lenovo or other major brands.

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NF-R8 redux-1800 PWM, High Performance Cooling Fan, 4-Pin, 1800 RPM (80mm, Grey)

NF-R8 redux-1800 PWM, High Performance Cooling Fan, 4-Pin, 1800 RPM (80mm, Grey)

Product ID: 49541282

Details

Air flow capacity
53.3 Cubic Per
Brand
Noctua
Compatible devices
Desktop Laptop
Cooling method
Air
Material
Fibre-glass
Maximum rotational speed
1800 RPM

⏳150,000+ hours MTTF

🌀1800 RPM max speed

🔇Ultra-quiet 17.1 dB(A)

172 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌀 Stay cool, stay ahead — silent performance that means business.

COMPACT YET MIGHTY - 80x80x25mm size packs a punch with 53.3 m³/h airflow, perfect for sleek builds and NAS setups.
PROVEN RELIABILITY - Backed by over 150,000 hours mean time to failure and Noctua’s legendary build quality—cool with confidence.
PRECISION PWM CONTROL - Seamlessly sync fan speed with your motherboard for dynamic cooling that adapts to your workload.
CUSTOMIZABLE ECOSYSTEM - Upgrade with anti-vibration mounts, extension cables, and more to tailor your cooling setup like a pro.
WHISPER QUIET POWERHOUSE - Experience premium airflow at a barely-there 17.1 dB noise level—your workspace’s new silent hero.

The Noctua NF-R8 redux-1800 PWM is a high-performance 80mm cooling fan delivering up to 1800 RPM with ultra-quiet operation at 17.1 dB(A). Featuring advanced PWM control for automatic speed adjustment, it ensures optimal airflow of 53.3 m³/h while maintaining exceptional reliability with over 150,000 hours MTTF. Designed for professional-grade desktop and NAS cooling, this compact fan combines award-winning Noctua engineering with a streamlined, cost-effective redux edition package.

Specifications

ASIN	B00KF7MVI2
Air Flow Capacity	53.3 Cubic Metres Per Hour
Best Sellers Rank	14,696 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 69 in Electronic Cooling Fans
Brand	Noctua
Compatible Devices	Desktop
Compatible devices	Desktop
Cooling Method	Air
Cooling method	Air
Customer Reviews	4.7 out of 5 stars 4,175 Reviews
Global Trade Identification Number	00842431012425, 04716123315339
Included Components	Please see product Description for what is included
Item Dimensions L x W x H	8L x 8W x 2.5H centimetres
Item Type Name	80 mm fan at 1800 rpm
Item Weight	0.3 Pounds
Manufacturer	Noctua
Manufacturer Part Number	NF-R8 redux-1800 PWM
Material	Fibre-glass reinforced PBT
Max Rotational Speed	1800 RPM
Model Number	NF-R8 redux-1800 PWM
Noise Level	17.1 Decibels
Number of Items	1
Power Connector Type	4-Pin
Power connector type	4-Pin
Product Warranty	6 year manufacturer’s warranty
Product dimensions	8L x 8W x 2.5H centimetres
UPC	804904101210 804067218916 842431012425 801940470928 731215273841 809394586615 808112938552
Unit Count	1.0 count
Voltage	12 Volts

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