The Thermalright Assassin X 120 Refined SE wins in 2 out of 3 comparable specs. Its biggest advantage is TDP Rating (131% better).
NH-L9i-17xx wins in 1 spec (Noise Level: 6% better).
Recommendation
Choose Assassin X 120 Refined SE if you want the best overall performance — especially tdp rating.
Choose NH-L9i-17xx if noise level matters more to you.
| Spec | NoctuaNH-L9i-17xx | ThermalrightAssassin X 120 Refined SE |
|---|---|---|
| Design | ||
| Type | Low Profile | Air Tower |
| Height | 37 mm | 148 mm |
| Performance | ||
| TDP Rating | 65W | 150W+131% |
| Fans | 1 | 1 |
| Fan Size | 92 mm | 120 mm |
| Acoustics | ||
| Noise Level | 23.6 dB(A)−6% | 25 dB(A) |
| Fan RPM | 600 - 2500 | 500 - 1550 |
| Compatibility | ||
| Sockets | LGA1851, LGA1700 | LGA1851, LGA1700, LGA1200, LGA1151, AM5, AM4 |
| Price | ||
| MSRP | $45 | $18−60% |
| Release Date | Nov 2021 | Jun 2023 |
