NH-D9L or NH-U12S
NH-D9L or NH-U12S
I own a Noctua U9S and a Scythe Mugen 5. They perform well at 4.3Ghz. At 4.4Ghz, I opt for a larger air cooler or a 240mm AIO. During the stress test, I reached around 75°C. The 240mm AIO offers roughly a 10-12°C edge over the U9S. The Mugen 5 is about 4°C more efficient than the U9S.
24/7 indicates regular daily operation without concern for wear. For optimal performance metrics, consider increasing voltage slightly—similar to running my 3600 at 4.5GHz with 1.39V. At that frequency, Cinebencg R20 achieves scores above 4100. But using such a high vcore over extended periods may cause CPU degradation within a few months.
No, it doesn't necessarily mean the CPU will fail soon. The situation depends on various factors like usage and maintenance.