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be quiet! Dark Rock 4 vs DeepCool AK400 G2: Comparison
be quiet! Dark Rock 4 and DeepCool AK400 G2 separate most on max speed: be quiet! Dark Rock 4 at 1400 RPM, DeepCool AK400 G2 at 2200 RPM, 36% in favour of DeepCool AK400 G2. Height splits them by another 3%, again favouring DeepCool AK400 G2. They match on 6 other specifications, including cooler type, tower type and tower layout.
Specs
| Specification |  |  |
|---|---|---|
| Brand | be quiet! | DeepCool |
| Cooler Type | Air Tower | Air Tower |
| Series | be quiet! Dark Rock 4 | DeepCool AK400 G2 |
| Tower Type | Single-Tower | Single-Tower |
| Model Number | BK021 | R-AK400G2-BKNNMN-GJD |
| Height | 160 mm-3% | 156 mm |
| Socket Compatibility | AMD AM4/AM5, Intel LGA1700/1200/115X/2066/2011-3 | AMD AM5/AM4, Intel LGA1851/1700/1200/115X |
| Tower Layout | Single-Tower | Single-Tower |
| Fan Count | 1 | 1 |
| Noise Level | 21.4 dBA | 31.45 dBA+10.1 dBA |
| Cooler Weight | 920 g | 950 g |
| Heatpipe Count | 6 | 4 |
| Fan Size | 135 mm | 120 mm |
| Max Speed | 1400 RPM-36% | 2200 RPM |
| PWM Control | Yes | Yes |
| Warranty | 3 years | 3 years |
| Source URL | https://www.bequiet.com/en/cpucooler/1376 | https://www.deepcool.com/products/Cooling/cpuaircoolers/AK400-G2-Wood-Grain-Top-Cover-CPU-Cooler/2025/21908.shtml |
Verdict
be quiet! Dark Rock 4
7.9 / 10 Expert Rating
A dependable, genuinely quiet single-tower cooler that's been slightly outclassed by be quiet!'s own newer Dark Rock 5, but still a solid mid-tier pick on sale.