NOCTUA NH-L9A CHROMAX.BLACK | SPECIFICATIONS |
DIMENSIONS | L: 114 x W: 92 x H: 37mm (including 15mm fan) |
MATERIALS | Copper (base and 2x heat-pipes), aluminium (cooling fins) |
COMPATIBILITY | AMD: AM4 |
FANS | 1x NF-A9X14 chromax.Black (2500RPM) |
RAM CLEARANCE | N/A |
THERMAL COMPOUND (INCLUDED) | Y (NT-H1) |
Noctua NH-L9a has max height of 37mm and has no motherboard or ram compatibility issues. The NH-L9a cooler is the AM4 specific variant of Noctua’s NH-L9i. The L9a includes one NF-A9x14 fan which comes in either chromax black or original brown.
TEST SYSTEM
All testing was completed on BC1T Open Testbench using the following hardware in 20°C room ambient temperature. CPU cooler fans were set to fixed 35dB(a) noise level at distance of 30cm.
CASE | Streacom BC1T Open Testbench |
MOTHERBOARD | GIGABYTE B550I AORUS PRO AX (paid link) |
CPU | Ryzen 5 5600X (paid link) |
CPU COOLER | Noctua NH-L9a (paid link) |
PSU | Corsair SF 600 Platinum (paid link) |
RAM | Crucial Ballistix 16GB (2x8GB) 3600MHz, CL16 (paid link) |
THERMAL BENCHMARKS
All CPU cooler testing was completed using CPU-Z in 10 minute stress test.


CONCLUSION
Noctua NH-L9a is straightforward to mount and has reasonably quiet operation during normal use. The NF-A9X14 chromax.Black fan ran at 35dB = 85% fan speed at distance of 50cm.
SOURCE
https://noctua.at/en/nh-l9a/