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.

How to check CPU cooler compatibility walks through socket, boost power, RAM clearance and case fit before you match this cooler to a processor.

Reviewed by Farrukh Sufyan SarwarHow we estimate temperaturesPrices verified Model v1.2 · data updated

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Sustained rating
220 W
at acceptable noise
Height
155 mm
fits most mid towers
RAM clearance
Any
no DIMM overhang
Excellent on
85 / 120
processors with headroom
Handles up to
229 W
Core i7-10700K
Amazon price
$17
live, see time above
Sockets in the boxAM5AM4LGA1851LGA1700LGA1200

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

The Thermalright Assassin X 120 R SE keeps 85 of the 120 processors it can mount (71 %) in the Excellent band and is 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.