Test Methodology and Performance
Comparison Coolers |
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|---|---|---|---|---|---|
| Category | Model | HEXUS Review | Reviewed Price | Warranty | Product Page |
| Air | be quiet! Dark Rock Pro 4 | April 2018 | £80 | 3 Years | bequiet.com |
| Cooler Master MasterAir MA620P | March 2018 | £75 | 2 Years | coolermaster.com | |
| Liquid | Aerocool Project 7 P7-L240 | February 2018 | £100 | 2 Years | aerocool.com.tw |
| Corsair Hydro Series H150i Pro RGB | January 2018 | £165 | 5 Years | corsair.com | |
| Fractal Design Celsius S24 | May 2017 | £105 | 5 Years | fractaldesign.com | |
| NZXT Kraken M22 | March 2018 | £90 | 3 Years | nzxt.com | |
HEXUS CPU Cooler Test Bench |
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|---|---|---|
| Hardware Components | Product Page | |
| Processor | Intel Core i7-8700K (overclocked to 4.8GHz) | intel.com |
| Motherboard | Asus ROG Maximus X Hero | asus.com |
| Graphics Card | MSI GeForce GTX 1080 Ti Gaming X Trio | msi.com |
| Memory | G.Skill Trident Z 32GB (2x16GB) DDR4-3200 | gskill.com |
| Power Supply | be quiet! Dark Power Pro 11 1,000W | bequiet.com |
| Primary Storage | 256GB WD Black PCIe SSD | wdc.com |
| Secondary Storage | 1TB Crucial MX300 SATA SSD | crucial.com |
| Chassis | be quiet! Dark Base 700 | bequiet.com |
| Monitor | iiyama ProLite X4071UHSU-B1 | iiyama.com |
| Operating system | Windows 10 Pro | microsoft.com |
Benchmark Process
Our test platform has been refreshed for 2018 and now includes a hexa-core Intel Core i7-8700K processor overclocked using 1.225v to 4.8GHz across all cores. The 12-thread chip is paired to 32GB of dual-channel G.Skill Trident Z DDR4 memory set to run at 3,200MHz using the built-in XMP profile.
To get a feel for how the coolers compare, CPU temperature is logged while a large 4K video clip is encoded in multiple passes using the freeware HandBrake utility. The workload tasks all available threads for a prolonged period and, in order to provide a stabilised reading, we then calculate the average temperature across all cores from the last five minutes of encoding.
Actual CPU temperature is recorded and we also graph the delta temperature - that's CPU temperature minus ambient temperature. Last but not least, to give you an idea of cooler acoustics, we use a PCE-318 noise meter to measure overall system noise in both idle and load states.
Notes
Our be quiet! Dark Base 700 chassis is set to run with its two stock SilentWings 3 PWM fans - a 140mm front intake and a 140mm rear exhaust - both of which are set to low speed (setting 1) via the integrated fan hub. All CPU cooler fans are set to a 'silent' profile from within the Asus BIOS, and when testing liquid coolers the pump is connected to the motherboard's dedicated water-pump header.
When a radiator is used, it is installed in the roof or rear of the chassis and any bundled fans are configured to push air through the radiator and out of the enclosure.
Performance
Want to run the Core i7-8700K's half-a-dozen cores at 4.8GHz across the board? You're going to need some serious cooling potential, and the be quiet! Dark Rock Pro 4 fits the bill.
We're impressed to see the cooler outperform all of the 240mm radiators in our line-up, and be quiet!'s cooling credentials are almost on a par with the 360mm Corsair Hydro Series H150i Pro RGB using this particular setup.
And the good news is that noise levels are right in line with our expectations of a be quiet! product. Taking away any pump noise results in the lowest idle reading we've seen to date - 28.5dB is bordering on silent - and though the fans do become audible under maximum load, they never emit anything more than a soft, steady hum. Top marks all round.
