Why cooling matters
The Raspberry Pi 5 delivers a significant performance increase over previous generations, with a faster CPU and GPU that handle demanding workloads. However, that additional computing power also produces more heat.
For lightweight tasks—browsing, basic programming, or simple automation—heat isn't a concern. But for intensive applications like:
- Retro gaming emulation
- Compiling large software projects
- Running a home server with continuous load
- AI and machine learning workloads
- 4K video playback or encoding
...the processor heats up quickly. Without adequate cooling, the Pi will throttle its performance to protect itself from overheating.
Understanding thermal throttling
Thermal throttling is a protective mechanism where the processor automatically reduces its clock speed when it gets too hot. This keeps temperatures under control and prevents hardware damage, but it also reduces performance—sometimes dramatically.
The Raspberry Pi 5 begins thermal throttling at around 80–85°C. Once that temperature is reached:
- CPU clock speed drops from 2.4 GHz to lower speeds
- Performance decreases noticeably
- Tasks take longer to complete
- The system may feel sluggish
Under sustained computational loads without cooling, a Pi can reach throttling temperatures in minutes. The graph from Raspberry Pi shows this dramatically: without cooling, temperature spikes immediately and stays at the throttling threshold. With active cooling (a fan), temperature remains well below that limit.
If your Pi only does light tasks occasionally, passive cooling (heatsinks alone) may be sufficient. But for any sustained workload or if you want consistent performance, active cooling is recommended.
The Active Cooler
To address thermal throttling, Raspberry Pi released the official Raspberry Pi 5 Active Cooler—a combined heatsink and temperature-controlled fan designed specifically for the Pi 5.
What it includes
- Large aluminum heatsink for passive heat dissipation
- Variable-speed fan for active cooling
- Temperature control that automatically adjusts fan speed
- Direct mounting to the Pi's processor
The Active Cooler is priced under $20 and provides significant cooling performance. When the processor is cool, the fan stays off or runs quietly. As temperature increases, the fan spins faster to draw heat away.
Alternative cooling solutions
Several third-party options also work well:
- Vilros cases with integrated fans for Raspberry Pi 4 and 5
- Aftermarket heatsink + fan combinations
- Passive heatsink-only solutions (for lighter workloads)
For maximum performance, choose an active cooling solution (one with a fan) rather than passive heatsinks alone.
Benefits of active cooling
Sustained maximum performance
With active cooling, your Pi 5 can run at its full 2.4 GHz clock speed indefinitely, even under heavy load. No throttling means no performance drops.
Longer hardware lifespan
Running cooler reduces thermal stress on components, potentially extending your Pi's operational life. Even if you aren't pushing performance limits, cooler operation is better for longevity.
Quieter than you'd expect
The Active Cooler's temperature control means the fan only spins as fast as needed. For light loads, it stays off or nearly silent. Even under full load, it's quieter than a laptop fan.
Essential for overclocking
If you plan to overclock your Pi 5 for even more performance, active cooling is absolutely required. Without it, thermal limits will prevent stable overclocking.
Setting up cooling
Installing the official Active Cooler or most third-party cooling solutions is straightforward:
- Power off and unplug your Raspberry Pi.
- If your Pi is in a case, remove it.
- Clean the processor's surface (the large chip) with isopropyl alcohol if needed.
- Apply thermal paste if your cooler requires it (the official Active Cooler includes pre-applied thermal material).
- Mount the heatsink/fan assembly according to its instructions, typically using clips or adhesive.
- Connect the fan's power cable to the Pi's fan header (if present) or to the 5V GPIO pins.
- Reassemble your case if you're using one that accommodates the cooler.
For detailed fan configuration and temperature control settings, see our guide Configure a Raspberry Pi cooling fan.
Ensure your cooling solution is designed for your Pi model. The Pi 5 has a different layout than the Pi 4, so coolers are not always interchangeable. Vilros cases and the official Active Cooler clearly specify which models they support.