Thermalright AXP90 X36 Black Low Profile CPU Air Cooler vs Thermalright AXP90 X53 Full Low Profile ITX CPU Cooler with 92mm Slim PWM Fan fo

Design and Form Factor

The Thermalright AXP90 X36 Black Low Profile CPU Air Cooler and the Thermalright AXP90 X53 Full Low Profile ITX CPU Cooler both prioritise compact dimensions for small-form-factor builds, yet they diverge in their height specifications. The X36 maintains a traditional low-profile design optimised for minimal vertical clearance, making it ideal for systems with memory clearance constraints. The X53, conversely, stands at 53mm total height and represents Thermalright's "full" low-profile iteration, offering increased heatsink surface area without sacrificing compatibility with ITX motherboards. This distinction means the X53 provides a middle ground between ultra-compact coolers and standard tower designs, granting users slightly more thermal capacity within compact builds. Both feature a 92mm slim PWM fan, ensuring consistent noise and performance profiles across the product line.

Cooling Technology and Heat Pipes

At the core of these coolers lies Thermalright's AGHP (Advanced Gravity Heat Pipe) technology. The X53 specifically utilises 4x6mm heat pipes with fourth-generation AGHP upgrades, a notable advancement aimed at solving the inverse gravity effect that occurs during vertical or horizontal orientation changes. The design incorporates two soldered heat pipe fins, which Thermalright claims doubles the heat transfer efficiency of the cooler's heatsink compared to previous iterations. The X36, whilst leveraging the AGHP framework, does not explicitly reference the same multi-pipe configuration or fourth-generation enhancements. For users planning builds with the cooler mounted in unconventional orientations or requiring superior thermal transfer rates, the X53's enhanced pipe technology represents a meaningful technical advantage.

Fan Performance and Bearing Technology

Both coolers feature a 92mm slim PWM fan with a 2700RPM high-speed capability, providing consistent airflow and noise characteristics. The distinction emerges in bearing technology: the X53 is equipped with Thermalright's STABLY-FDB V2 bearings—referred to as S-FDB bearings—which are engineered specifically to prevent fan blade shaking during vertically oriented installations. This bearing technology also addresses durability concerns in compact form factors, extending the cooler's operational lifespan. The specifications indicate an industrial service life of up to 20,000 hours for the S-FDB bearings, providing long-term reliability assurance. Whilst both coolers deliver equivalent nominal fan speeds, the X53's advanced bearing design offers enhanced stability and longevity, particularly valuable in systems experiencing irregular mounting orientations.

Compatibility and Platform Support

Both the Thermalright AXP90 X36 Black Low Profile CPU Air Cooler and the X53 support an extensive range of socket types, including Intel LGA1700, LGA1150, LGA1151, LGA1200, and AMD AM4 and AM5. This broad compatibility makes them viable options for nearly all modern CPU platforms, whether you're building a compact Intel or AMD system. The X53's documentation explicitly notes careful consideration for installation quirks, including handling potential conflicts between the backplane and rear motherboard components, as well as compatibility with non-removable metal backplates on certain AM4/AM5 configurations. The coolers ship with appropriate metal mounting fasteners tailored to each platform. Both models arrive with comprehensive installation support, though the X53's additional technical notes suggest a slightly more complex installation process on certain motherboards.

Price and Value Proposition

The Thermalright AXP90 X36 Black Low Profile CPU Air Cooler carries a current price of C$26.90 with consistent pricing across all measurement periods, suggesting stable market conditions. The Thermalright AXP90 X53 Full Low Profile ITX CPU Cooler is priced at C$45.99, representing a premium of C$19.09 over the X36. The 90-day average price for the X53 sits at C$45.28, indicating price consistency. At roughly 71% more expensive, the X53 justifies its premium through advanced heat pipe technology, enhanced bearing systems, and increased heatsink mass. For budget-conscious builders seeking basic low-profile cooling, the X36 delivers exceptional value. Those prioritising superior thermal performance and longevity in compact systems will find the X53's incremental cost reasonable.

Market Position and Popularity

The Thermalright AXP90 X36 Black Low Profile CPU Air Cooler currently ranks at position 8,792 in overall sales and holds a bestseller rank of 3 within its category, indicating strong category-specific popularity and customer acceptance. The Thermalright AXP90 X53 Full Low Profile ITX CPU Cooler achieves a sales rank of 6,913 with a category bestseller rank of 13, suggesting broader overall market reach but slightly less concentrated category dominance. The X36's stronger category ranking suggests it has captured the minds of compact-build enthusiasts searching for affordable, reliable solutions. The X53's broader sales rank improvement indicates growing recognition among general consumers, though it remains less dominant within specialised CPU cooler categories. Both products benefit from Thermalright's established reputation as a Taiwan-based brand with over two decades of development experience.

Build Compatibility and Space Considerations

When selecting between these coolers, motherboard real estate and case clearance become paramount considerations. The X36's more aggressive low-profile design suits cramped Mini-ITX systems where every millimetre matters, particularly regarding RAM clearance with tall memory modules. The X53, whilst still classified as "low-profile," trades some vertical compatibility for increased thermal mass. Users with standard ITX systems or cases offering modest clearance headroom benefit from the X53's superior cooling capacity. The X36 remains the superior choice for ultra-compact builds such as NAS systems or media centres where cooler height directly impacts overall system dimensions. Both models support front backplane installation and reverse backplane configurations, providing flexibility in motherboard installation approaches. Measuring your case's cooler clearance height before purchasing is essential for ensuring compatibility.

Which should you buy?

Choose the Thermalright AXP90 X36 Black Low Profile CPU Air Cooler if you prioritise budget efficiency and operate in exceptionally space-constrained environments where cooler height directly impacts case compatibility. At C$26.90, it represents outstanding value and maintains a strong bestseller rank, affirming its suitability for users seeking basic, reliable low-profile cooling. Conversely, select the Thermalright AXP90 X53 Full Low Profile ITX CPU Cooler if your build permits 53mm cooler height and you desire superior thermal performance through advanced AGHP heat pipe technology and precision S-FDB bearings. The X53's C$45.99 price remains competitive and justifies the investment through enhanced durability and thermal transfer efficiency. For most compact systems beyond the tightest form factors, the X53 delivers meaningfully better cooling performance and longevity, making it the recommended choice for users willing to invest modestly for improved thermals.