10-Pack USB to 4-Pin Fan Adapter Cable | 5V USB CPU & Chassis

Power your PC and chassis fans directly from any USB port with this handy 10-Pack USB to 4-Pin Fan Adapter Cable. Designed for DIY PC builders, home lab enthusiasts, and Raspberry Pi projects, this set of 10 cables lets you run 3-pin or 4-pin PWM fans from a standard 5V USB-A source — no extra power supply or drivers required. Simply plug into your motherboard's USB header and you're up and running instantly.

Key Features

• Pack of 10 Cables — Great value; keep spares on hand for multiple builds or upgrades
• Dual Interface — USB-A to 4-Pin (30 cm) and USB-A to 3-Pin (30 cm) configurations included
• 22AWG Thick-Core Wire — Premium tin-plated copper conductors (thicker than the common 26AWG market cables) for reliable, stable power delivery
• Plug & Play — No drivers, no software; insert into a USB port and fans spin up immediately
• PWM & ARGB Fan Compatible — Works with standard 3-pin and 4-pin PWM fans including Noctua and other popular brands
• Built-In Safety — Short-circuit protection and overcurrent safeguards for worry-free operation
• Heat-Resistant Wire Insulation — Durable construction rated for continuous use in warm PC enclosures
• Cold-Press Connectors — Precision-crimped contacts ensure a secure, low-resistance connection
• Low-Noise Operation — Running 12V fans at reduced voltage results in quieter, lower-speed airflow — ideal for silent builds

Specifications

What's in the Box?

• 10 × USB to 4-Pin / 3-Pin Fan Adapter Cables (30 cm each)

Please note: Because USB supplies 5V, connecting a rated-12V fan via these cables will reduce fan speed compared to running on a dedicated 12V header. This is ideal for silent, low-airflow setups.

For more information on safe electrical and component practices for DIY electronics, visit the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: What are these USB to 4-pin fan adapter cables used for?

A: These adapter cables let you power 3-pin or 4-pin PC fans directly from a standard 5V USB-A port — such as a motherboard USB header or any USB charger. They are perfect for CPU cooling fans, PC case (chassis) fans, Raspberry Pi setups, and other DIY PC builds where a dedicated 12V fan header is unavailable.

Q: Will 12V fans work properly when powered through a 5V USB adapter cable?

A: Yes, 12V fans will operate at a reduced speed when connected via a 5V USB source. The lower voltage results in slower, quieter rotation — which is ideal for silent PC builds or situations where moderate airflow is preferred. The fans will not run at their rated maximum speed on 5V.

Q: What wire gauge do these cables use, and why does it matter?

A: These cables use 22AWG tin-plated copper conductors, which are significantly thicker than the 26AWG wire commonly found in budget USB cables. Thicker wire carries current more efficiently, runs cooler, and provides a more stable connection — especially important when powering multiple fans simultaneously.

Q: Are these cables compatible with PWM and ARGB fans?

A: Yes. The cables are compatible with standard 3-pin fans, 4-pin PWM fans, and ARGB-compatible fans, including popular brands like Noctua. They work with any fan that uses a standard 3-pin or 4-pin motherboard connector.