Quick Summary
The Thermalright Assassin King 120 SE is a CPU air cooler with 5 heatpipes and a TL-C12C PWM fan. It is built for CPU cooling and the listed socket support covers AM4, AM5, Intel LGA1150, LGA1151, LGA1155, LGA1156, LGA1200, LGA1700 and LGA1851.
The cooler measures 120 x 73 x 148 mm and the fan size is 120 x 120 x 25 mm. If you are checking case fit, the stated height is 148 mm.
Who It Is Best For
This cooler suits buyers who need a tower-style CPU air cooler and want to check socket support and case clearance before ordering. It is also relevant if you are comparing a cooler for an Intel or AMD system and want the listed socket compatibility in one place.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Product name | Thermalright Assassin King 120 SE CPU Air Cooler. |
| Cooling type | CPU air cooler for PC cooling. |
| Heatpipes | 5 heatpipes are listed as part of the cooling design. |
| Fan model | TL-C12C PWM fan is included. |
| Fan size | 120 x 120 x 25 mm. |
| Fan speed | 1550 rpm ±10%. |
| Power connection | 4-pin fan connection. |
| Voltage | 12V. |
| Noise level | ≤25.6 dB(A) as listed. |
| Air flow | 66.17 CFM max. |
| Dimensions | 120 x 73 x 148 mm, with the 148 mm height important for case clearance. |
| Weight | 0.8 kg. |
| Heat sink material | Aluminium. |
| Socket support | Intel LGA1150, LGA1151, LGA1155, LGA1156, LGA1200, LGA1700, LGA1851 and AMD AM4, AM5. |
Why Buyers Choose It
- 5 heatpipes give a clear cooling specification to compare against other CPU air coolers.
- The 120 mm PWM fan provides a defined size and connector type for system matching.
- The stated 148 mm height gives a practical case-clearance check before purchase.
- Socket support for AM4, AM5 and several Intel LGA platforms makes compatibility easier to confirm.
What To Know Before You Buy
Check your CPU socket carefully before ordering, especially if you are matching an Intel or AMD platform. Review your case clearance against the stated 148 mm height, as this is the most important fit check for installation. The fan uses a 4-pin connection and 12V power, so make sure your motherboard connection matches what you need.
Pros: The listed socket support covers a wide range of Intel and AMD platforms.
Cons: Case fit needs checking against the stated 148 mm height.
Common Buyer Questions
Which sockets does it support?
It is listed for Intel LGA1150, LGA1151, LGA1155, LGA1156, LGA1200, LGA1700 and LGA1851, plus AMD AM4 and AM5.
How tall is the cooler?
The stated height is 148 mm, so case clearance should be checked before ordering.
What fan does it use?
It uses a TL-C12C PWM fan in a 120 x 120 x 25 mm size with a 4-pin connection.
What is the listed noise level?
The listed noise level is ≤25.6 dB(A).
Final Buying View
The Thermalright Assassin King 120 SE is a CPU air cooler for buyers who need confirmed socket support and a stated 148 mm height to check against their case. Compare the socket list and clearance details with your build before making your choice.





