CPU Cooler Check

Noctua · Low-profile air cooler

NH-L12S CPU compatibility

Rated for 120 W sustained, it holds CPUs up to the Core Ultra 5 225 (121 W) below their junction limit in our model, and keeps 30 of 120 processors in the Excellent band.

Reviewed by Farrukh Sufyan SarwarHow we estimate temperaturesPrices verified

Rated

120 W

Height

70 mm

Price

~$65

RAM clearance
48 mm
Type
Low-profile air cooler
Sockets in the box
AM5AM4LGA1851LGA1700LGA1200
Noctua NH-L12S product photo
Amazon$74.95as of Sep 17, 11:38 PM UTC · In Stock

Check bundled mounting kits before ordering; revisions add sockets over time.

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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.

Design and fitment

The Noctua NH-L12S is a low-profile air cooler rated for about 120 W of sustained heat at acceptable noise. It stands 70 mm tall, which fits most mid-tower and many compact cases, and clears 48 mm memory modules under its front fan in the stock position.

Mounting kits for AM4, AM5, LGA1200, LGA1700, LGA1851 are in the box. Every current desktop socket is covered.

Which processors it suits

Across the 120 processors it can mount, the NH-L12S rates Excellent on 30 (25 %) and a throttling risk on 84. The most power-hungry chip it holds comfortably is the Core i3-10100 at 90 W (estimated 80 °C under full load). Throttling risk begins around 120 W parts such as the Ryzen 5 7600X3D.

In practice that makes it a good match for 65 W class processors and compact builds where height matters more than headroom.

VS

Compared with close alternatives

01

AM5

bracket included
02

AM4

bracket included
03

LGA1851

bracket included
04

LGA1700

bracket included
05

LGA1200

bracket included

Terms used on this page

Sustained dissipation rating
The continuous heat load, in watts, a cooler can remove at acceptable noise. This site uses realistic sustained figures rather than marketing peak numbers, and models temperature as ambient plus load ÷ rating × a per-load scale.
Thermal headroom
The cooler's sustained dissipation rating minus the CPU's boost power limit, in watts. Positive headroom lets fans run slower and quieter; 25 W or more is rated Excellent here.
RAM clearance
The tallest memory module that fits under an air cooler's front fan in its stock position. Dual-tower coolers with less than 42 mm clash with tall RGB kits (typically 44 mm) unless the fan is raised.
CPU cooler height
The installed height of an air cooler from the motherboard, compared against the case's published CPU cooler clearance. Coolers at or above 160 mm exclude many compact Micro-ATX and tempered-glass mid-towers.