WDERAIR
40mm x 20mm 4-Pin PWM 12V PC Cooling Fan 2-Pack
Bottom line: The WDERAIR 40mm x 20mm 4-Pin PWM 12V PC Cooling Fan 2-Pack is a specs-and-price decision rather than a crowd-consensus one in the retro cpu coolers & fans category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.
As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →
Pros & Cons
Pros
- ✓ Backed by WDERAIR's warranty and support channels
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
SpecPicks Verdict
SpecPicks scored WDERAIR 40mm x 20mm 4-Pin PWM 12V PC Cooling Fan 2-Pack using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpu coolers & fans category. WDERAIR's retro cpu coolers & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. 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 retro cpu coolers & 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
- 【Small 40mm Fan】40 x 40 x 20 mm (1.57 x 1.57 x 0.79 inches) | Rated Voltage: 12V | Rated Current: 0.05 A | Power: 0.4 W | Speed: 5000 RPM | AIR Pressure: 0.11 In H2O | Airflow: 5.52 CFM | Noise: 22 dBA | Connector: 4Pin | Bearing: Dual Ball
- 【High CFM Computer Fan】4PIN; (+): Red Wire ; (-): Black Wire. FG function：Yellow Wire; PWM: Blue Wire. High air flow to enhance cooling performance
- 【DC Brushless Fan 12V】Good for computer case, radiator and cpu heatsink cooling, server cabinet, rackmount case, refrigerator exhaust, 3d Printer enclosure, project ventilation, PC chassis and electronic equipment
- 【Service & Support】Please feel free to inquire if you have any problems using the product or need technical support.We will respond as soon as possible.
Full Specifications
| Brand | WDERAIR |
|---|---|
| Model | 4020B12V4P |
| Voltage | 12 volts |
| Material | Plastic |
| Dimensions | 40 x 40 x 20 mm |
| Noise Level | 22 db |
| Part Number | 4020B12V4P |
| Compatibility | PC |
| Material Type | Plastic |
| Cooling Method | fan |
| Number of Items | 2 |
| Air Flow Capacity | 5.52 cfm |
| Compatible Devices | Desktop, Radiator |
| Power Connector Type | 4-Pin |
| Maximum Rotational Speed | 5000 rpm |
| Item Dimensions L x W x H | 1.57"L x 0.79"W x 1.57"H |
Ready to buy?
40mm x 20mm 4-Pin PWM 12V PC Cooling Fan 2-Pack 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.
Related Retro CPU Coolers & Fans
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Best Retro Handhelds in 2026 — From $35 to $500
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- Best 1440p Gaming GPUs in 2026
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- How to Build a Windows 98 Retro PC in 2026
More reviews from the SpecPicks archive
Browse all reviews →- Ryzen AI Max vs RTX 40 Series: Which Wins for AI and Gaming?
- Ryzen 7 5800X3D vs Core i7-14700K: The 2026 DDR4 Value Fight
- Intel Axes BigDL: What It Means for CPU and Arc LLM Inference
- When Does a Homelab Become a Job?
- Best IDE & CompactFlash to USB Adapters for Retro PCs 2026
- First-Time CPU Delidding: What to Expect and How to Get It Right
- Best Budget Gaming PC Build Parts in 2026: 5 Core Picks
- OpenAI Codex Price War vs Running a Local Coding Model on an RTX 3060
- Best 4K Gaming Monitor for the PS5 Pro and PC in 2026
- Adding USB Audio to a Retro Windows XP Gaming PC: Sound BlasterX G6
- Best CPU Cooler for AM4 Ryzen 7 5800X Overclocking Under $100 in 2026
- Best SSD for a Local AI / LLM Workstation in 2026
- Build a Pi Zero W Handheld Retro Emulator in 2026: Full Parts List and Setup
- Ryzen 7 5800X vs 5700X for 1080p Gaming: Which AM4 Chip Wins in 2026?
- Watercooled Gaming/Networking Rack: 2025 Build Guide
- Best SSD for a PS4 Pro Upgrade in 2026: 870 EVO vs BX500
- News: Mistral Enters Robotics With Robostral Navigate 8B
- How to run Llama 3.1 70B on Apple M4 Pro
- Ryzen 7 9800X3D Hits Record-Low Price — and the 5800X Value Case
- Best Wireless Controller for PC Gaming on Couch and Living Room (2026)
- LLM-Driven Driver Install on Windows 98, 2000, and XP: Vision-LLM Walkthroughs from a 4-PC Retro Fleet
- Steam Deck OLED vs Legion Go S: 2026 Comparison
- Can You Run Kimi K3 Locally? VRAM Math for the New Open Model
- GPU VRAM Guide: Running a 5GB TTS Model Locally
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