Razer Kunai Hydraulic 140MM aRGB PC Fan: Quiet
Bottom line: The Razer Kunai Hydraulic 140MM aRGB PC Fan: Quiet ($59.95 on Amazon as of 2026-10-06): 81 CFM max airflow at 1600 RPM for high-load PC cooling; main trade-off: PWM fan controller sold separately, adds to cost.
As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ 81 CFM max airflow at 1600 RPM for high-load PC cooling
- ✓ Quiet 15 dBA floor via hydraulic bearing at low RPM
- ✓ Daisy-chain up to 8 fans on one aRGB/PWM controller
- ✓ Chroma RGB with 16.8M colors and gameplay-reactive effects
Cons
- ✗ PWM fan controller sold separately, adds to cost
- ✗ Full RPM/lighting control requires Razer Synapse software
- ✗ Chroma effects lock you into Razer's controller ecosystem
- ✗ 30 dBA at full 1600 RPM is audible under load
Manufacturer description
Get form and function that blows you away. Meet the Razer Kunai hydraulic bearing performance aRGB fans powered by Razer Chroma™ with fan blade technology inspired by elite military aircraft for stealthy, efficient cooling, and addressable LEDs for unique case designs.
SpecPicks Verdict
SpecPicks scored Razer Kunai Hydraulic 140MM aRGB PC Fan: Quiet using a rating × review-volume × price-fit model applied to published specs and reviews across the cooling & fans category. Compare with similarly-priced alternatives in the cooling & fans category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for cooling & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- Quiet, Powerful: Cool your PC with high airflow aRGB fans packed with LEDs and lighting effects powered by Razer Chroma RGB
- Connect Up to 8 Fans: Daisy chain and connect up to 8 Razer Kunai fans to Pulse Width Modulation and aRGB controllers to create immersive lighting effects - supported by Razer Synapse software for ultimate customization
- PWM Fan Controller Support: Whether you need maximum airflow to cool your PC or run quietly at lower RPMs, our Pulse Width Modulation fan controller allows you to conveniently adjust fan speed based on your needs (PWM fan sold separately)
- Powered by Razer Chroma RGB: Unlock ultimate aRGB customization with 16.8 million colors, light patterns, and effects which react to your gameplay - get the world’s largest lighting ecosystem and control it from one platform
- Cooling: 500-1600 RPM/ Airflow: 34.48-81 CFM
- Noise: 15-30 dBA/Voltage: 12V=0.40A (140mm)
Full Specifications
| Brand | Razer |
|---|---|
| Model | RC21-01810200-R3M1 |
| Noise | 15-30 dBA/Voltage: 12V=0.40A (140mm) |
| Voltage | 12 Volts |
| Wattage | 3.6 watts |
| Material | Copper |
| Cooling | 500-1600 RPM/ Airflow: 34.48-81 CFM |
| Unit Count | 1.0 Count |
| Noise Level | 15 Decibels |
| Part Number | RC21-01810200-R3M1 |
| Compatibility | PC |
| Material Type | Copper |
| Cooling Method | Fan |
| Item Type Name | PC Cooling Fans |
| Number of Items | 3 |
| Quiet, Powerful | Cool your PC with high airflow aRGB fans packed with LEDs and lighting effects powered by Razer Chroma RGB |
| Air Flow Capacity | 81 Cubic Feet Per Minute |
| Compatible Devices | Desktop |
| Included Components | Fan |
| Power Connector Type | 4-Pin |
| Full listing title | Razer Kunai Hydraulic 140MM aRGB PC Fan: Quiet, Powerful aRGB Fans - PWM Fan Controller Support & Connect Up to 8 Fans - Powered by Razer Chroma RGB - 3 Fans |
Ready to buy?
Razer Kunai Hydraulic 140MM aRGB PC Fan: Quiet, Powerful aRGB Fans - PWM Fan Controller Support & Connect Up to 8 Fans - Powered by Razer Chroma RGB - 3 Fans is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Related Cooling & Fans
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- Best Retro Handhelds in 2026 — From $35 to $500
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Best 1440p Gaming GPUs in 2026
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- How to Build a Windows 98 Retro PC in 2026
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
More reviews from the SpecPicks archive
Browse all reviews →- Best Raspberry Pi 5 Home Lab Cluster Setup for Self-Hosting (2026)
- Cerebras Running GPT-5.4 and 5.5 Internally: What it Means for Local LLM Builders
- Best Gaming CPU for 1440p Builds in 2026
- This Retro Switch 2 Dock Looks Exactly Like an N64 — and Holds Six Cards
- GeForce 4 Ti 4600 AGP in 2026: Period-Correct Win98 Install Guide
- GPT-5.6 Deleted a User's Files: Why Local, Sandboxed Agents Matter
- Best Raspberry Pi Alternative in 2025: Full Buying Guide
- CPU Offload for Local LLMs: Does a Ryzen 7 5800X Help?
- Samsung's 256GB microSD Drops to $47.99 — and What It Means for Cheap Storage
- Mistral Robostral Navigate: An 8B Model Steers Robots From One Camera
- Best Budget SSD for Gaming and PC Upgrades in 2026
- Build a Frigate AI Security-Camera NVR on a Raspberry Pi 4 8GB in 2026
- Raspberry Pi 4 8GB in 2026: Still the Best Home-Lab SBC for Under $80
- Build a Raspberry Pi 4 8GB NAS with SATA SSDs in 2026
- Best Webcam for PC Game Streaming Under $100 (2026)
- Ryzen 5 5600G vs Ryzen 7 5700X for a Budget Homelab and Virtualization Box in 2026
- Claude Code + Fable 5 Ported Command & Conquer to iOS in Hours: What Local Coding Rigs Need
- Best USB Microphone for Streaming in 2026: HyperX QuadCast 2 vs Blue Yeti
- Copilot Cowork Goes Usage-Based: The Local-Rig Cost Case in 2026
- Handheld Gaming PCs With a Keyboard: 2025 Guide
- AI-Driven Win98 Voodoo3 Driver Recovery on a Raspberry Pi 5 Companion
- Imaging Vintage Hard Drives in 2026: SATA/IDE-to-USB Adapters Compared (FIDECO vs Unitek vs Vantec)
- Claude Limits Cut: Why a Local Fallback Rig Just Got Cheaper
- Best Raspberry Pi for Local LLMs & Home Lab in 2026: Pi 4 8GB vs Pi Zero
Earliest SpecPicks reviews
Browse full archive →- Best GPU for Llama 3.1 8B (2026)
- Best GPU for Qwen 3 14B (2026)
- Best GPU for Qwen 3 32B (2026)
- Best GPU for Llama 3.1 70B (2026)
- Best GPU for DeepSeek-R1 32B (2026)
- Best GPU for Llama 3.1 405B (2026)
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 14B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 70B on NVIDIA GeForce RTX 5090
- How to run DeepSeek-R1 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 4090