Noctua NH-L9a Review

Noctua NH-L9a is a 37mm tall low profile cooler with no motherboard or ram compatibility issues. The NH-L9a is specific to AMD and NH-L9i to Intel. This is one of the few 37mm tall low profile coolers.


DIMENSIONS114×92×37mm (L×W×H)
MATERIALS2x 6mm copper heat-pipes, copper base (nickel plated), aluminium cooling fins
WEIGHT390g (heatsink only)
FANS1x Noctua NF-A9x14 HS-PWM,
600~2500 (+/- 10%)


Testing is carried out on BC1 Mini v2 (open testbench), using the following hardware, in 20°C ambient room temperature. We noise normalised the cooler fan speed to 35dB(A) at distance of 50cm. This helps eliminate brute force cooling from higher RPM fans.

CASEBC1 Mini v2 (Open Testbench)
MOTHERBOARDRog Strix B650E-I Gaming WiFi (paid link)
CPUR7 7800X3D (paid link)
CPU COOLERNoctua NH-L9a (paid link)
PSU Extreme 850R (paid link)
RAM32GB Gskill Ripjaws S5 DDR5, 6000MHz, CL30 (paid link)


We run Cinebench R23 multicore (stability test), for period of 30 minutes. This provides worse case scenario for a given CPU. CPU coolers are typically tested across range of CPU’s for data validation and to reduce risk of errors in testing. This also helps account for variables between CPU platforms.