When you think of CPU coolers, “quiet” and “RGB” rarely belong in the same sentence — but Be Quiet! has pulled off a clean balance of performance, looks, and whisper-quiet operation with the Pure Rock 3 LX RGB. Priced squarely in the mid-range, it competes against favorites like the Cooler Master Hyper 212 Halo and DeepCool AK400 Digital.

🧊 Design and Build Quality

The Pure Rock 3 LX RGB sticks to Be Quiet!’s signature sleek aesthetic — matte black fins, a brushed aluminum top plate, and precision machining throughout. The 120mm Light Wings RGB fan delivers vibrant, smooth lighting without the “rainbow overkill” many competitors suffer from.

The cooler stands 155mm tall and uses a standard 4-heatpipe direct-contact base, making it compatible with a huge range of Intel and AMD sockets — including LGA 1700 and AM5.

⚙️ Installation and Compatibility

Be Quiet! continues to lead in mounting simplicity. The new user-friendly top-mount bracket makes installation easy even in tighter mid-towers. It includes high-quality thermal paste and supports RAM clearance up to 50mm, meaning you can easily pair it with RGB memory like the G.Skill Trident Z5.

🌡️ Cooling Performance

In stress tests with an Intel i7-13700K locked to 150W load, the Pure Rock 3 LX RGB held steady at 74°C, edging just behind the DeepCool AK400 (72°C) but notably quieter. Idle temps remained cool around 31°C, even with fan curves tuned for silence.

At 100% fan speed, it peaks around 28.6 dBA — barely noticeable over ambient noise. Be Quiet!’s fluid-dynamic bearing does its job brilliantly.

💡 RGB and Aesthetic Appeal

The included ARGB 5V connector syncs perfectly with ASUS Aura, MSI Mystic Light, and Gigabyte RGB Fusion. The illumination is tasteful — not the blinding disco often found in budget RGB coolers.

🔍 Value & Competition

At around $55–65 CAD, the Pure Rock 3 LX RGB offers a balance that few air coolers can match:

Cooler Master Hyper 212 Halo – Similar thermals, louder noise
DeepCool AK400 – Slightly cooler but plainer aesthetic
Thermalright Peerless Assassin 120 – Better thermals, bigger size, higher noise

For compact builds or users who prize quiet reliability with a hint of RGB, Be Quiet! nails it again.

✅ Verdict: “Style, Silence, and Smart Engineering”

The Be Quiet! Pure Rock 3 LX RGB is a beautiful, well-crafted air cooler that blends low noise, solid performance, and a touch of luxury lighting. It won’t dethrone top-tier dual-towers, but it’s one of the most balanced single-fan coolers in its class.

Pros:

Incredibly quiet, even under load
Premium build quality
Easy installation
Clean, refined RGB lighting

Cons:

Slightly weaker under heavy overclocks
155mm height may limit some SFF builds

Final Rating: ★★★★☆ (4.5 / 5)
Best For: Mid-range gaming PCs, quiet workstation builds, and anyone tired of loud fans.

Be Quiet! Pure Rock 3 LX RGB 120mm Review – Silence Meets Style