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NH-L9a TDP guidelines


The NH-L9a is a low-profile quiet cooler designed for use in small form factor cases and HTPC environments. While it provides first rate performance in its class, it is not suitable for overclocking and should be used with care on CPUs with more than 65W TDP (Thermal Design Power). Please see the following table for our detailed recommendations and also read the explanations below:

Socket Codename TDP rating SKU Compatibility & remarks
AM4 (with NM-AM4-L9aL9i) Summit Ridge 65W or less all compatible
95W all compatible
Recommended with good case ventilation and typical workloads only (not recommended for continuous 100% load on all CPU cores).
Bristol Ridge 65W or less all compatible
AM2(+)/AM3(+)/FM1/FM2(+) all 65W or less all compatible
100W or more all incompatible


CPU temperatures depend on various different factors, so please take note of the explanations below and keep in mind that our recommendations can only serve as general guidelines for typical setups.


1) Our recommendations are based on an ambient temperature of 25°C or less. If your ambient temperature is significantly higher (30°C or more), we only recommend the cooler for configurations where we specify full compatibility without any additional remarks or restrictions. Please also ensure good case ventilation when ambient temperature is 30°C or more.


2) Our recommendations assume that the cooler is installed in a typically equipped, properly ventilated HTPC system. If you are using particularly hot components inside your system, it may be necessary to use stronger case ventilation to ensure sufficient CPU cooling performance.


3) Our recommendations assume that the fan is used with PWM control (configured so that it can speed up to 100% when necessary) but without the supplied Low-Noise Adaptor. If you would like to use the cooler with the supplied Low-Noise Adaptors, we recommend choosing CPUs with less than 65W TDP.


4) All our TDP recommendations are based on thorough testing with the default values specified by AMD using popular applications such as Asus Realbench and prime95. Please note, however, that prime95 creates a particularly high load that goes beyond typical application scenarios and this leads to elevated temperatures. We thus recommend using other programs such as Realbench for checking the stability and temperatures of the CPU in realistic scenarios.