Thermalright or Be Quiet!? CPU Coolers Compared in 2026
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When you search for thermalright vs be quiet CPU cooler options for small builds, two low-profile models stand out. Both the Thermalright AXP90-X53 and the be quiet! Pure Rock are designed for ITX systems and fit in tight cases. They share a 92mm fan size for quiet operation. The main difference lies in their physical dimensions and material construction. The Thermalright unit is taller but uses pure copper heat pipes, while the be quiet! model is shorter but lists a specific TDP rating. You need to check your case clearance carefully.
Key differences
| Aspect | Thermalright 53mm Low Profile ITX CPU Cooler | be quiet! Pure Rock Low Profile CPU Cooler |
|---|---|---|
| Cooler Height | 53mm | 45mm |
| Heat Pipes | 4 pure copper pipes | not listed |
| TDP Rating | not listed | 100W |
| Weight | 1.1 pounds | 12.7 ounces |
| Fan Noise | 22.4dB (A) | 30.6dB(A) |
Which one should you choose?
Choose Thermalright 53mm Low Profile ITX CPU Cooler if
- You need a cooler that fits within a 53mm height limit but offers more copper mass for heat dissipation.
- You prioritize lower noise levels at maximum fan speed, as this model specifies 22.4dB.
- You are building an ITX system where the extra height is acceptable for better thermal contact.
Choose be quiet! Pure Rock Low Profile CPU Cooler if
- You have extremely tight clearance and need the shortest possible profile at just 45mm.
- You want a lighter cooler that weighs only 12.7 ounces for easier mounting.
- You need a clear 100W TDP rating to ensure compatibility with your specific processor power draw.
Verdict: Choose the Thermalright AXP90-X53 if you can accommodate the extra height and want pure copper heat pipes for better heat transfer. Pick the be quiet! Pure Rock if your case has very strict height limits or you need a lighter unit with a defined 100W TDP rating. Both are viable for small form factor builds.
Thermalright vs Be Quiet Low Profile
Cooler Height
Height is the most critical spec for small form factor builds. The Thermalright AXP90-X53 stands at 53mm tall, while the be quiet! Pure Rock is even slimmer at 45mm. Both use 92mm fans, but the Pure Rock’s lower profile offers more clearance for tall RAM sticks or case sides. If your chassis has strict height limits, the be quiet! model provides extra room. The Thermalright is still low profile, but the be quiet! variant wins for extreme compactness.
Heat Pipe Count
Heat transfer relies heavily on the number of pipes connecting the base to the fins. The Thermalright AXP90-X53 includes four pure copper heat pipes using AGHP technology to prevent gravity issues. The be quiet! Pure Rock specifications do not list the number of heat pipes in the provided data. Without this specific count, you cannot verify if it matches the Thermalright’s four-pipe setup. The Thermalright clearly states its internal construction, giving you more confidence in its thermal path.
Fan Noise Level
Quiet operation matters in small cases where fans run louder. The Thermalright AXP90-X53 lists a maximum noise level of 22.4 dB(A) at 2700 RPM. The be quiet! Pure Rock claims a maximum of 30.6 dB(A). The Thermalright is significantly quieter on paper, offering a smoother experience for silent builds. If low decibels are your priority, the Thermalright’s specifications indicate superior acoustic performance compared to the be quiet! model.
TDP Rating
Thermal Design Power indicates how much heat the cooler can handle. The be quiet! Pure Rock is rated for 100W TDP. The Thermalright AXP90-X53 specifications do not provide a specific TDP rating in the data. This means you must estimate its capacity based on its size and fan speed. The be quiet! model gives you a clear performance benchmark for mid-range CPUs, while the Thermalright requires you to infer its limits from other specs.
Socket Compatibility
Both coolers support modern and older platforms. The Thermalright AXP90-X53 supports Intel LGA1150, 1151, 1155, 1156, 1200, 1700, and 1851, plus AMD AM4 and AM5. The be quiet! Pure Rock supports Intel 1700, 1200, 1150, 1151, 1155, and AMD AM4 and AM5. The Thermalright adds support for the older LGA1156 and the new LGA1851 sockets. If you use legacy or very new Intel boards, the Thermalright offers broader coverage.
Which Low Profile Cooler Suits You
Ultra-tight case builders needing minimal height
The be quiet! Pure Rock measures only 45mm tall, making it the slimmer option for extremely constrained chassis. It supports modern Intel sockets like LGA1700 and AMD AM5. Its compact 92mm fan operates quietly at 30.6dB. This cooler is ideal if your case clearance is the primary constraint and you need broad socket compatibility without exceeding 45mm.
Users prioritizing heat pipe technology and base material
The Thermalright AXP90-X53 features a pure copper base and four 6mm heat pipes using AGHP technology. This design helps solve gravity effects in vertical orientations. It reaches 2700RPM with 42.58CFM airflow. If you value specific heat transfer materials and advanced pipe construction for better thermal dissipation in small builds, this model offers those technical advantages.
Those seeking higher fan speed and airflow
The Thermalright unit pushes air at 2700RPM, delivering 42.58CFM of airflow. The be quiet! model caps at a lower speed. If you need maximum air movement to cool components in a small ITX case, the Thermalright fan specs provide higher volume. Its 53mm height still fits most small form factor cases while offering this performance boost.
The products compared
Thermalright 53mm Low Profile ITX CPU Cooler
Best for: Low-power ITX builds under 100W TDP
- Socket Compatibility
- AM4, AM5, LGA1150/1151/1200/1700/1851
- Cooler Height
- 53mm
- Heat Pipes
- 4
- Tower Design
- Low-Profile
- Fan Size
- 92mm
- Fan Speed
- 2700 RPM
View on Amazon: Thermalright 53mm Low Profile ITX CPU Cooler Affiliate link
This Thermalright AXP90-X53 is a low-profile air cooler designed for small ITX builds. It stands 53mm tall and uses four pure copper heat pipes with AGHP technology to manage heat effectively. The included 92mm fan runs at up to 2700 RPM, offering quiet operation at 22.4 dB. It supports Intel LGA1700/1851 and AMD AM5 sockets. You should choose this if you need a compact solution that fits in tight spaces without sacrificing cooling performance.
Pros
- 53mm low-profile height fits small chassis
- 4 pure copper heat pipes with AGHP technology
- 92mm PWM fan with 2700 RPM max speed
- Supports Intel LGA1700/1851 and AMD AM5
Cons
- Limited to 100W TDP cooling capacity
- 92mm fan size may not fit all cases
- Aluminum radiator limits heat dissipation speed
Good fit if
- You build in an ITX case with height limits
- You use a low-power CPU under 100W
- You need compatibility with Intel LGA1700 or AMD AM5
Skip if
- You have a high-TDP CPU over 100W
- Your case requires a 120mm fan clearance
- You need RGB lighting or software control
Verdict: Thermalright AXP90-X53 Low Profile CPU Cooler is a solid choice for ITX builders with low-power CPUs. It fits tight spaces while providing adequate cooling for systems under 100W.
be quiet! Pure Rock Low Profile CPU Cooler
Best for: small cases and mid-range CPUs
- Cooler Height
- 45mm
- Heat Pipes
- 3
- Tower Design
- Low Profile
- Fan Size
- 92mm
- TDP Rating
- 100W
- Color
- Black
View on Amazon: be quiet! Pure Rock Low Profile CPU Cooler Affiliate link
The Be Quiet! Pure Rock Low Profile is a compact air cooler designed for small form factor builds. It stands only 45mm tall and supports Intel 1700 and AMD AM5 sockets. The unit includes a 92mm fan that operates at a maximum of 30.6dB. It handles up to 100W TDP. This cooler suits users needing minimal height clearance without sacrificing basic cooling performance.
Pros
- 45mm height fits tight cases
- Supports latest Intel 1700 and AMD AM5 sockets
- Quiet 92mm fan with 30.6dB max noise
- Handles 100W TDP loads
Cons
- 100W TDP rating limits high-end CPUs
- 92mm fan size restricts airflow compared to larger units
- No RGB lighting included
Good fit if
- You need a cooler under 50mm tall
- You build in a compact ITX case
- You use a mid-range CPU under 100W
Skip if
- You require support for high-TDP gaming processors
- You prefer larger 120mm or 140mm fans for better airflow
- You want RGB lighting effects
Verdict: Be Quiet! Pure Rock Low Profile is a practical solution for small cases with modest cooling needs. It fits users who prioritize height clearance and socket compatibility over raw thermal performance.
Specifications side by side
| Spec | Thermalright 53mm Low Profile ITX CPU Cooler | be quiet! Pure Rock Low Profile CPU Cooler |
|---|---|---|
| Socket Compatibility | AM4, AM5, LGA1150/1151/1200/1700/1851 | not stated |
| Cooler Height | 53mm | 45mm |
| Heat Pipes | 4 | 3 |
| Tower Design | Low-Profile | Low Profile |
| Fan Size | 92mm | 92mm |
| TDP Rating | not stated | 100W |
| Fan Speed | 2700 RPM | not stated |
| System Type | ITX | not stated |
| Color | AXP90 X53 | Black |
| Features | Fan | not stated |
| Dimensions | 3.72 × 3.74 × 2.09 inches | 3.63 × 3.63 × 1.78 inches |
| Weight | 1.1 pounds | 12.7 ounces |
| Size | 53mm | not stated |
| Model | AXP90 X53 | BK034 |
Frequently asked questions
Which cooler is better for a 100W TDP ITX build?
The Thermalright AXP90-X53 is the better choice for low-power systems under 100W TDP. It is specifically designed for ITX builds and provides adequate cooling for these modest thermal requirements. Its 53mm height fits well in tight spaces while handling the heat output of lower-power CPUs effectively.
How do the dimensions of these two coolers compare?
The Thermalright AXP90-X53 measures 3.74 inches wide, 3.72 inches long, and 2.09 inches high. The be quiet! Pure Rock is slightly smaller at 3.63 inches wide and long, with a height of 1.78 inches. Both are compact, but the be quiet! model offers less vertical clearance.
What is the weight difference between the Thermalright and be quiet! coolers?
The Thermalright AXP90-X53 weighs 1.1 pounds, making it heavier than the be quiet! Pure Rock. The Pure Rock model weighs only 12.7 ounces. This weight difference may matter if you are concerned about motherboard strain in very small form factor cases with limited mounting support.
Are these coolers suitable for modern Intel and AMD sockets?
Yes, both models support modern sockets. The be quiet! Pure Rock supports Intel LGA1700 and AMD AM5. The Thermalright AXP90-X53 is designed for ITX systems, implying broad compatibility, though specific socket lists are not provided in the data. Both are built for current generation platforms.
Which cooler is better for extremely tight case constraints?
The be quiet! Pure Rock is better for extremely tight cases. It measures only 1.78 inches in height, making it the slimmer option compared to the Thermalright AXP90-X53. If your case has very limited CPU cooler height clearance, the Pure Rock provides a more practical fit without compromising on basic cooling.
Do these coolers come in different colors?
The be quiet! Pure Rock comes in Black. The Thermalright AXP90-X53 is listed with the model color AXP90 X53, which typically refers to the unit itself. If you have a specific aesthetic requirement for your build, the be quiet! option offers a standard black finish that blends with most components.