The Noctua NH-L9i-17xx wins in 2 out of 3 comparable specs. Its biggest advantage is MSRP (10% better).
NH-U12S Redux wins in 1 spec (TDP Rating: 162% better).
Recommendation
Choose NH-L9i-17xx if you want the best overall performance — especially msrp.
Choose NH-U12S Redux if tdp rating matters more to you.
| Spec | NoctuaNH-L9i-17xx | NoctuaNH-U12S Redux |
|---|---|---|
| Design | ||
| Type | Low Profile | Air Tower |
| Height | 37 mm | 158 mm |
| Performance | ||
| TDP Rating | 65W | 170W+162% |
| Fans | 1 | 1 |
| Fan Size | 92 mm | 120 mm |
| Acoustics | ||
| Noise Level | 23.6 dB(A)−6% | 25.1 dB(A) |
| Fan RPM | 600 - 2500 | 450 - 1700 |
| Compatibility | ||
| Sockets | LGA1851, LGA1700 | LGA2011-3, LGA2011, LGA2066, LGA1851, LGA1700, LGA1200, LGA1156, LGA1155, LGA1151, LGA1150, AM5, AM4 |
| Price | ||
| MSRP | $45−10% | $50 |
| Release Date | Nov 2021 | Sep 2021 |
