Noctua NH-L12Sx77, Low-Profile CPU Cooler (120mm, Brown)

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ProductTypeTDP RatingAirflowNoiseValuePrice

NH-L12Sx77, Low-Profile CPU Cooler (120mm, Brown)

Noctua★★★★★4.6

Air

100W

35.0 CFM

23.9dBA

Library quiet

$79.95

2 stores

Specifications

asinB0CWH97GKV

reviews183

Weight540 Grams

Noise23.9dBA Library quiet

CompatibilityDesktop

TypeAir

Height70mm

TDP Rating100W

Fans Included1 fan

socketsAM5,AM4,LGA1700,LGA1200

RGBNo

value0

Radiator120

Airflow35.0 CFM

UPC00841501100505

Model #NH-L12Sx77

PERFORMANCE

40%

Customer Reviews★★★★★5.0 · 5 reviews

★★★★★Noctua NH-L12Sx77 — Perfect Fit for My Fractal Terra Build

The Noctua NH-L12Sx77 ended up being exactly what I needed for my Fractal Design Terra. The fit is spot on—at 77mm it basically uses every bit of available clearance, and it honestly feels like it was designed specifically for this case. No awkward compromises or clearance issues, which is rare in SFF builds. Not only does it look great! What surprised me most is how well it cools. Even in a tight case like the Terra, temps stay controlled during gaming and normal workloads, and it does it quietly. Installation was straightforward, and the overall build quality is typical Noctua—solid and well thought out. Bottom line: In my setup, this cooler just works. Clean fit, strong cooling, and very quiet—exactly what you want in a compact build.

JM · 2026-04-16 · via amazon

★★★★★Beautiful Performance

Used this in a SSF (Fractal Terra) Case.  It was a perfect fit!  Best CPU cooler for this case due to the fan being under the radiator.  This setup eliminated the noise created from the fan being too close to the case grill/cover.  Cooling is always a challenge with these Small Form Factor (SSF) builds but this thing does a nice job of cooling the CPU.  If I had anything negative to say, it would be the price!  It's Noctua.  It's a beautiful piece of art but man do you pay for it!

Frank · 2025-12-15 · via amazon

★★★★★Great heat sink.

It keeps me PC cool. Uses little power not loud,and easy to install.

Amazon Customer · 2026-03-06 · via amazon

★★★★★Not cheap but it works great. Big fan is quiet.

Not cheap but high quality.  Replaced the crummy stock cooler in my Lenovo Ideacenter PC that didn't even cover the CPU fully.  Now it can suck down the wattage without throttling.  Monitored it while rendering video to stress it, at over 100W it was still below 70C and it never throttled.  This is with an I7 14700.

S. Hoffman · 2025-11-05 · via amazon

★★★★★Perfect Fit for Compact Builds with Strong Cooling

The Noctua NH-L12Sx77 is an excellent low-profile cooler and the absolute largest that will fit in my Fractal Terra case. It keeps my 9800X3D from thermal throttling with just a slight undervolt. For a small form factor build, this is a perfect balance of size and performance. The cooler was easy to install and came with all required hardware/thermal-paste.

Brian · 2025-09-09 · via amazon

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