---
product_id: 491113206
title: "ARCTIC S4028-6K - 40x40x28 mm Server Fan, 250–6000 RPM, PWM Regulated, 4-pin ..."
brand: "arctic"
price: "18232CFA"
currency: XOF
in_stock: null
reviews_count: 8
category: "Arctic"
url: https://www.desertcart.sn/products/491113206-arctic-s4028-6k-40x40x28-mm-server-fan-250-6000-rpm
store_origin: SN
region: Senegal
---

# 12.06 m³/h airflow 6000 RPM max speed Dual ball bearing durability ARCTIC S4028-6K - 40x40x28 mm Server Fan, 250–6000 RPM, PWM Regulated, 4-pin ...

**Brand:** arctic
**Price:** 18232CFA
**Availability:** ❌ Out of Stock

## Summary

> 💨 Power your server’s chill with precision and durability — don’t let heat slow your hustle!

## Quick Answers

- **What is this?** ARCTIC S4028-6K - 40x40x28 mm Server Fan, 250–6000 RPM, PWM Regulated, 4-pin ... by arctic
- **How much does it cost?** 18232CFA with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/491113206-arctic-s4028-6k-40x40x28-mm-server-fan-250-6000-rpm)

## Best For

- arctic enthusiasts

## Why This Product

- Trusted arctic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** 40x40x28 mm size fits tight 1U server spaces without compromising airflow performance.
- • **Durability Engineered:** Dual ball bearings ensure long-lasting reliability even under heat and dust stress.
- • **Precision PWM Control:** Seamlessly adjust fan speed from whisper-quiet to powerful cooling with PWM regulation.
- • **Versatile Compatibility:** Standard 4-pin connector plus 2/3-pin header support with 40 cm cable for flexible installation.
- • **Balanced Cooling & Noise:** Optimized static pressure and airflow deliver efficient cooling with minimal noise intrusion.

## Overview

The ARCTIC S4028-6K is a high-performance 40mm server fan featuring a wide 250–6000 RPM speed range controlled via PWM, dual ball bearings for enhanced durability, and a robust airflow of 12.06 m³/h. Designed for 1U server cases and compact devices, it balances efficient cooling with low noise, making it ideal for professional-grade rack cooling and specialized compact systems.

## Description

Buy ARCTIC S4028-6K - 40x40x28 mm Server Fan, 250–6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC, Rack Cooling Fan - Black: CPU Cooling Fans - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Five-Star Fans That I Removed From My System - I picked up one of the 6,000rpm variants of these fans to aim at the 12VHPWR connector on my RTX 5090—you know, just to be safe. I even 3D printed a little right-angle duct adapter to funnel air down over the connector itself. Ultimately, I ended up removing it from the system because I found the noise output unacceptable, even at very low operating speeds. ➤ The Challenge with 40mm Fans 40mm fans can be tricky with noise. Twenty to thirty years ago, 40x10mm was a common size on chipsets and video cards, and I've had quite a few fans in that form factor that were essentially inaudible when installed in a case. I've also had other 40mm fans—like these Arctics—that produce specific tones that pierce through just about anything you mount them to or in. In terms of quantitative noise levels, these are very quiet fans for what they are. I have some 40mm Sanyo Denkis on a 2.5" drive cage that max out at about 13,000rpm and are audible across the house at 8,000rpm; these Arctics are nothing like that. Qualitatively though, the noise these produce is specifically irritating to me. I can sit next to the server with those Sanyo Denkis screaming away and after a few minutes stop noticing them. A cynic might point out that this is because after a few minutes next to that server, I've gone deaf, but this is neither here nor there. By contrast, the single Arctic I had on the 5090, running at ~2,000rpm, was far more irritating in spite of being far quieter. It was *just* audible as a faint ticking buzz over the rest of the system. And unfortunately, at ~2,000rpm, it didn't move enough air to make a difference in my use case, so it was just added irritation with no benefit. It's not that they're loud—it's that the specific tone they make, even in the context of what they are, is particularly grating to me. But this is intrinsically subjective, so your experience may differ. ➤ Use Case Matters For their intended use case (in a 1U server), these are extremely quiet and highly power efficient. For use in a desktop, they become meaningfully audible far before they move a meaningful amount of air. As far as 40mm fans go, these are outstanding. But unless you have a specific need for a 40mm fan, you would generally be better served finding an alternative way to accomplish whatever task you're considering these for. ➤ Bottom Line I can't and won't knock any stars off the fan itself—these earn the full five stars easily. They're power-efficient, quiet for what they are, dual ball bearing, exceptionally well-built, and Arctic provides actual performance data including P/Q curves and PWM curves. Both are generally absent with consumer-grade fans and are hugely useful if you know how to read them, signaling that Arctic is serious about selling these for actual industrial/server use. For the home/enthusiast/desktop user, these are clearly audible below 2,000rpm, and probably outright unacceptable over 3,000rpm. If you have a specific need for them, I'd recommend them very highly. On balance these are likely the best 40mm fans on the market. At the same time, if you can accomplish your goal with a larger fan, you'd probably be happier going that route.
Review: A bit loud, but performant - These fans are a bit louder than I would have hoped for, but they're still quieter than what they replaced. I did some math before buying and determined that the 6K variant would not be enough for my use case on a Tesla P40. That was correct, as these fans have to be at 11-12K RPM to keep temperatures under control. Under a more moderate load, they can run at 9K or less to keep it cool. Overall, if you're trying to cool a 250W TDP or so GPU like a Tesla P40, these work fairly well for the price.

## Features

- The S4028-6K's impeller is held in place by two ball bearings, making it both especially durable as well as less sensitive to external influences such as heat and dust
- The S4028-6K has a particularly wide speed range that can be regulated via PWM and voltage. With its 6000 RPM max it offers a well-balanced ratio between cooling power and noise
- With a static pressure of 4.2 mm/H2O and a maximum airflow of 12.06 m³/h, the S4028-6K is a true all-rounder and is suitable as both radiator and case fan
- The S4028-6K fits in 1U server cases as a replacement fan for routers, switches, and NAS. It can also be used for other products such as DVRs, Mini PCs, HTPCs, hard disk enclosures and 3D printers
- The fan has a standard 4-pin fan connector and can also be connected and controlled on 2-pin or 3-pin headers, while its 40 cm cable allows enough flexibility in positioning

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09S9WDKVT |
| Air Flow Capacity | 185 Cubic Feet Per Minute |
| Best Sellers Rank | #122 in Computer Case Fans |
| Brand | ARCTIC |
| Compatible Devices | Desktop |
| Cooling Method | Air |
| Customer Reviews | 4.5 4.5 out of 5 stars (133) |
| Date First Available | February 9, 2022 |
| Item Weight | 0.634 ounces |
| Item model number | ACFAN00185A |
| Manufacturer | ARCTIC |
| Material | Plastic |
| Maximum Rotational Speed | 6000 RPM |
| Number of Items | 1 |
| Power Connector Type | 2510 4-Pin Fan-Connector |
| Product Dimensions | 1.1"L x 1.57"W x 1.57"H |
| UPC | 840033401609 |
| Voltage | 12 Volts |
| Wattage | 1.2 watts |

## Product Details

- **Air Flow Capacity:** 185 Cubic Feet Per Minute
- **Brand:** ARCTIC
- **Compatible Devices:** Desktop
- **Cooling Method:** Air
- **Material:** Plastic
- **Maximum Rotational Speed:** 6000 RPM
- **Power Connector Type:** 2510 4-Pin Fan-Connector
- **Product Dimensions:** 1.1"L x 1.57"W x 1.57"H
- **Voltage:** 12 Volts
- **Wattage:** 1.2 watts

## Images

![ARCTIC S4028-6K - 40x40x28 mm Server Fan, 250–6000 RPM, PWM Regulated, 4-pin ... - Image 1](https://m.media-amazon.com/images/I/51tHzOmapnL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Five-Star Fans That I Removed From My System
*by S***S on October 13, 2025*

I picked up one of the 6,000rpm variants of these fans to aim at the 12VHPWR connector on my RTX 5090—you know, just to be safe. I even 3D printed a little right-angle duct adapter to funnel air down over the connector itself. Ultimately, I ended up removing it from the system because I found the noise output unacceptable, even at very low operating speeds. ➤ The Challenge with 40mm Fans 40mm fans can be tricky with noise. Twenty to thirty years ago, 40x10mm was a common size on chipsets and video cards, and I've had quite a few fans in that form factor that were essentially inaudible when installed in a case. I've also had other 40mm fans—like these Arctics—that produce specific tones that pierce through just about anything you mount them to or in. In terms of quantitative noise levels, these are very quiet fans for what they are. I have some 40mm Sanyo Denkis on a 2.5" drive cage that max out at about 13,000rpm and are audible across the house at 8,000rpm; these Arctics are nothing like that. Qualitatively though, the noise these produce is specifically irritating to me. I can sit next to the server with those Sanyo Denkis screaming away and after a few minutes stop noticing them. A cynic might point out that this is because after a few minutes next to that server, I've gone deaf, but this is neither here nor there. By contrast, the single Arctic I had on the 5090, running at ~2,000rpm, was far more irritating in spite of being far quieter. It was *just* audible as a faint ticking buzz over the rest of the system. And unfortunately, at ~2,000rpm, it didn't move enough air to make a difference in my use case, so it was just added irritation with no benefit. It's not that they're loud—it's that the specific tone they make, even in the context of what they are, is particularly grating to me. But this is intrinsically subjective, so your experience may differ. ➤ Use Case Matters For their intended use case (in a 1U server), these are extremely quiet and highly power efficient. For use in a desktop, they become meaningfully audible far before they move a meaningful amount of air. As far as 40mm fans go, these are outstanding. But unless you have a specific need for a 40mm fan, you would generally be better served finding an alternative way to accomplish whatever task you're considering these for. ➤ Bottom Line I can't and won't knock any stars off the fan itself—these earn the full five stars easily. They're power-efficient, quiet for what they are, dual ball bearing, exceptionally well-built, and Arctic provides actual performance data including P/Q curves and PWM curves. Both are generally absent with consumer-grade fans and are hugely useful if you know how to read them, signaling that Arctic is serious about selling these for actual industrial/server use. For the home/enthusiast/desktop user, these are clearly audible below 2,000rpm, and probably outright unacceptable over 3,000rpm. If you have a specific need for them, I'd recommend them very highly. On balance these are likely the best 40mm fans on the market. At the same time, if you can accomplish your goal with a larger fan, you'd probably be happier going that route.

### ⭐⭐⭐⭐⭐ A bit loud, but performant
*by S***L on January 14, 2026*

These fans are a bit louder than I would have hoped for, but they're still quieter than what they replaced. I did some math before buying and determined that the 6K variant would not be enough for my use case on a Tesla P40. That was correct, as these fans have to be at 11-12K RPM to keep temperatures under control. Under a more moderate load, they can run at 9K or less to keep it cool. Overall, if you're trying to cool a 250W TDP or so GPU like a Tesla P40, these work fairly well for the price.

### ⭐⭐⭐⭐⭐ Great fans - perfect for replacing in old equipment
*by S***X on March 6, 2024*

I have bought multiple packs of the 6K and used them all over. Imo I would say the difference in noise between these and a Noctua is fairly neglible so don't believe those that say these are insanely loud. I may be biased because I am replacing MUCH louder fans in old server equipment so anything quieter is a blessing, however I have tested the Noctua and the 6K version side by side in a quiet computer room of mine and even being next to them on full blast these were barely audible. I hooked them up to a bench top power supply giving 12V DC so there was no confusion of if they were each on full blast or if the noise was being muddied by other fans. I think the Noctua is a better pick if you absolutely value complete silence above all and you intend to use these in a computer that you have tuned to full blast. Otherwise with PWM I would pick these 100% of the time - they're much cheaper AND they move MUCH more air than the Noctuas, which is another great benefit in old server components -- I need the airflow. Ultimately these are a great buy and I would definitely recommend them!

## Frequently Bought Together

- ARCTIC S4028-6K - 40x40x28 mm Server Fan, 250–6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC, Rack Cooling Fan - Black
- Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown)
- Noctua NF-A4x20 FLX Computer Case Fan - Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-03-03*