Will it fit · CPU cooler
Yes
The Thermalright Peerless Assassin 120 SE is 155 mm tall and the Lian Li A3-mATX takes air coolers up to 165 mm (10 mm to spare).
| Case's max cooler height | 165 mm |
|---|---|
| Thermalright Peerless Assassin 120 SE height | 155 mm |
| Room left | 10 mm |
| Case type | micro-ATX tower |
Case limits from the maker's spec sheet (checked 2026-10-15).
Yes. The Thermalright Peerless Assassin 120 SE is 155 mm tall and the Lian Li A3-mATX takes air coolers up to 165 mm (10 mm to spare).
165 mm for air coolers, and radiators up to 360 mm (360 mm on top).
