DeepCool AK620 Digital CPU Cooler Review

Peter Donnell / 1 year ago

Test System & Methodology

Idle tests are recorded after 10 minutes of the system being left alone after boot with no additional background processes or software running. All load tests are performed in Cinebench R2, first using a single speed run to generate the Cinebench R23 score, then a 10-minute loop to determine the overall all-core average load temperature for the relevant cooler.

Clock speeds are left at the default factory settings provided by the CPU and our NZXT Z690 N7 motherboard. Optimised settings lock the CPU P-Cores to 4.9Hz and the E-Cores to 4GHz at a voltage of 1.3v. Fan speeds for the case are set to 30% at all times. Pump RPM is fixed to 100% for liquid coolers, and CPU cooler fans are left to the motherboard “automatic” and “normal” profile unless otherwise stated.

Acoustics are measured from 2ft above the NZXT H7 Flow PC case, using a decibel meter, with all side panels and filters in place on the case and as stated, the case fans are left at 30% (just to the point where they become comfortably audible over ambient), to represent a real-world usage scenario. We are no longer testing coolers on an open-air test bench for this reason.

As of 20/07/2023, all coolers featured on these charts were retested to reflect our improved methodology, and as such, reviews before this date can not be fairly compared to the new results. However, we have been periodically retesting older coolers, which is why you may see their performance figures here, and why they may not align with previous test results from the same product in their respective reviews.

Test system:

NZXT Z690 ATX
Intel Core i9-12900K @ stock and & 4.9 GHz all P-Core 4 GHz E-Core 1.3v
Aorus RTX 2080
16GB Crucial DDR4 4400 MHz XMP
512GB NVMe SSD
Thermaltake Tough Power 750W
NZXT H7 Flow RGB Case
All testing is conducted using NT-H1 thermal paste

We want to thank Gigabyte, Noctua, Crucial, Intel, Thermaltake, NZXT and more for providing us with the above testing equipment and their ongoing support.

Testing Methodology

We always use Noctua Noctua NT-H1 thermal paste to make sure testing reveals the efficiency of the tested coolers not the efficiency of the bundled thermal paste
Cinebench R23 is run for 10 minutes to calculate “load” results
Multiple readings are taken with the average of the package temperatures calculated for our recorded result
Fans are left to operate at default PWM profile speeds unless otherwise stated
For water cooling tests, all pumps have been operated at 12 volts unless otherwise stated
Ambient temperatures should be between 21-23 degrees in all our tests unless otherwise stated
Acoustic measurements are taken 60cm vertically away from the CPU cooler
Stock tests are performed using “out of the box” settings for the CPU
All coolers were tested under identical settings unless otherwise stated.
There is approximately a 1-degree Celsius margin of error in our temperature recording software CPUID HW Monitor
There is approximately a 1.5dBA margin of error with our Benetech GM1351 decibel meter
In all these graphs we may have a few “reference” results of particular products that do not fit within that category for comparative purposes.