12cm 3000RPM PC Cooling Fan with Speed Controller 3V–12V

12cm 3000RPM Cooling & Exhaust Fan with Variable Speed Controller

Keep your build running cool and quiet with this high-performance 12cm (120mm) cooling and exhaust fan. Designed for demanding environments, this fan operates at up to 3000 RPM and features a built-in variable speed controller that lets you dial in airflow anywhere from 3V to 12V. Whether you're managing thermals in a crypto mining rig, a workstation tower, a server rack, or a network cabinet, this fan delivers reliable, consistent airflow where you need it most.

Made in Mainland China.

Key Features

• 120mm (12cm) fan blade — a universally compatible size that fits most PC chassis, server cabinets, and equipment racks
• Up to 3000 RPM — delivers powerful, high-volume airflow for hot-running hardware
• 3V–12V variable speed controller — fine-tune fan speed and noise level to suit your setup
• Wide compatibility — ideal for BTC/crypto miners, PC chassis, workstations, server radiators, cabinet enclosures, and more
• AC powered — straightforward connection for desktop and rack-mounted systems
• Durable construction — built for continuous, long-term operation in demanding computing environments
• Low-noise operation at lower voltages — dial down the speed for a quieter workspace

Specifications

Compatible With

• Bitcoin & cryptocurrency mining rigs
• Desktop PC towers and mid/full-tower chassis
• Workstation computers and rendering builds
• Server racks and network cabinets
• Radiator and liquid-cooling setups
• DIY electronics enclosures and maker projects

Why Choose This Fan?

The built-in speed controller sets this fan apart from standard fixed-speed options. You get the flexibility to push maximum airflow during heavy loads, then turn it down for silent browsing or light workloads — all without swapping hardware or adjusting BIOS settings. It's a simple, effective thermal management upgrade for any serious build.

For more information on best practices for computer cooling and airflow in electronics enclosures, visit Energy.gov – Energy-Efficient Electronics.

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Learn more: Fan (machine)

Frequently Asked Questions

Q: What size is this cooling fan and what systems is it compatible with?

A: This is a standard 120mm (12cm) fan, the most widely used size in PC and server cooling. It is compatible with PC chassis, workstation towers, BTC/crypto mining rigs, server racks, network cabinets, radiator mounts, and most standard 120mm fan mounting points.

Q: What does the speed controller do and how does it work?

A: The included variable speed controller allows you to adjust the fan's operating voltage from 3V up to 12V. Lower voltages result in slower, quieter operation, while higher voltages deliver maximum airflow and RPM (up to 3000 RPM). Simply turn the dial to find the balance between cooling performance and noise level that works for your environment.

Q: Can I use this fan in a cryptocurrency mining rig?

A: Yes — this fan is specifically designed with BTC and cryptocurrency miners in mind. Mining rigs generate significant heat during continuous operation, and this fan's high 3000 RPM top speed and variable controller make it an excellent choice for keeping your mining hardware within optimal operating temperatures.

Q: Is this fan suitable for 24/7 continuous use?

A: Yes. This fan is built for continuous, long-term operation, making it well-suited for servers, mining rigs, and workstations that run around the clock.