CPU Cooler Check

Thermalright · Single-tower air cooler

Assassin X 120 R SE CPU compatibility

Rated for 220 W sustained, it holds CPUs up to the Core i7-10700K (229 W) below their junction limit in our model, and keeps 85 of 120 processors in the Excellent band.

Reviewed by Farrukh Sufyan SarwarHow we estimate temperaturesPrices verified

Rated

220 W

Height

155 mm

Price

~$30

RAM clearance
Unrestricted
Type
Single-tower air cooler
Sockets in the box
AM5AM4LGA1851LGA1700LGA1200
Thermalright Assassin X 120 R SE product photo
Amazon$17.49as 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 Thermalright Assassin X 120 R SE is a single-tower air cooler rated for about 220 W of sustained heat at acceptable noise. It stands 155 mm tall, which fits most mid-tower and many compact cases, and does not overhang the memory slots, so RAM height is not a concern.

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 Assassin X 120 R SE rates Excellent on 85 (71 %) and a throttling risk on 25. The most power-hungry chip it holds comfortably is the Core i7-12700K at 190 W (estimated 87 °C under full load). Throttling risk begins around 230 W parts such as the Ryzen 9 7900X.

In practice that makes it a good match for Core i5 and Ryzen 5/7 processors, with headroom for quiet fan curves.

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.