DeepCool AK620 Digital Review: Like No Other Air Cooler

A digital display on an air cooler

DeepCool AK620 Digital
(Image: © Tom's Hardware)

Tom's Hardware Verdict

DeepCool’s AK620 Digital is among the strongest air coolers on the market, and it packs an unexpected innovation with it’s LCD display status screen that lets you monitor CPU stats.


  • +

    Strong performance with both Intel & AMD systems

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    Competitive with high-end air coolers

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    LCD Display shows CPU temperature & utilization info


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    Display comes with a higher price, but non-Digital version is available for less

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    Review units had vibration issues

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DeepCool is well known in the cooling and component world, having delivered innovative, interesting and budget-conscious PC cases and cooling products for more than a decade. Its current lineup includes air and AIO coolers, computer cases, keyboards, power supplies and other accessories. We’ve been impressed recently by the company’s Assassin IV air cooler, and DeepCool’s 360mm LT720 AIO currently holds our one of our top recommendations on our list of best AIO coolers.  

The company’s latest cooler to land on our test bench is the DeepCool AK620 Digital. This model features the same premium design of DeepCool’s AK620 Zero Dark, but features an innovative addition: a digital display embedded in the top that showcases both CPU temperature and utilization statistics. We’ve previously tested the original version of DeepCool’s AK620 with Intel’s i9-10850K. But does the screen-packing Digital model have what it takes to tame today’s hotter CPUs like Intel’s i7-13700K? We’ll of course have to put it through our usual testing to see if it is still worthy of a spot on our best CPU coolers list. But first, here are the cooler’s full specs, direct from DeepCool. 

(Image credit: Tom's Hardware)


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CoolerDeepCool AK620 Digital
MSRP$79.99 USD
Installed Size129 (L) x 138 (W) x 162 mm (H)
Heatsink MaterialAluminum
Heatpipes6x Copper Heatpipes
Socket CompatibilityIntel Socket LGA 2066/2011-v3/2011/1700/1200/1151/1150/1155 AMD AM5 / AM4
BaseNickel plated Copper
Max TDP (Our Testing)233W on Intel i7-13700K, 129W on AMD Ryzen 7 7700X

Packing and Included Contents 

DeepCool’s AK620 digital is packaged in molded foam, cardboard, and plastic to protect the contents during shipping.  

(Image credit: Tom's Hardware)

Included with the package are the following:

  • Full-size screwdriver
  • Fan clips for two fans
  • Two DeepCool FK120 fans
  • Dual-tower radiator heatsink
  • Digital Display cover
  • A tube of thermal paste
  • PWM splitter
  • User Manual
  • Mounts for all modern CPU sockets (including AM5 & LGA1700)

(Image credit: Tom's Hardware)

Installation on LGA1700 and AMD AM4 AM5

It’s not hard to install DeepCool’s AK620 Digital. The process is fairly similar on both AMD and Intel platforms. 

1. If you’re running an AMD Ryzen system, you’ll need to start by removing the default retention bracket. Intel users will need to apply the backplate to the motherboard.

2. Place the mounting standoffs against the motherboard. Then place the mounting bars on top and secure them with the included thumbscrews. 

3. After applying thermal paste to the CPU, lift the display cover from the cooler’s heatsink and remove the middle fan. Then place the heatsink against the mounting bars. Secure the heatsink against the mounting bars using the included screwdriver. 

(Image credit: Tom's Hardware)

4.  Replace the middle fan and secure it using the fan clips and place the display on top of the heatsink.

(Image credit: Tom's Hardware)

5. Finally, peel off the plastic that protects the display during shipping and connect the cables to the appropriate ports.

(Image credit: Tom's Hardware)

Features of DeepCool’s AK620 Digital

DeepCool’s AK620 Digital features the same premium quality design as the previously released AK620 Zero Dark, but adds an innovative LCD display.

⋇ Real-time Status Screen

The biggest feature of the Digital series coolers is the LCD display that rests on top of the heatsink. There have been a few coolers in the past that showed temperature information, but none quite like DeepCool’s. By default, the display switches between showing CPU temperature and utilization statistics, and these can be lightly customized – you can show temperatures in either C or F, for example. Below the primary portion of the screen is DeepCool’s logo, softly illuminated. The top and bottom edges support aRGB illumination, giving it a subtle glow.

The display can be controlled by DeepCool’s Digital software, and allows for minor customizations like chosing whether the CPU temperature is showing in Celsius or Fahrenheit. By, default the device will blink when the CPU reaches maximum temperature. But you can disable this with the software. You can also choose whether the display shows CPU utilization or temperature information, or alternates between the two.

(Image credit: Tom's Hardware)

⋇  Six copper heatpipes, nickel-plated contact plate

The cooler features six copper heatpipes and a nickel-plated copper CPU block with microfins for transferring heat away from the CPU.

(Image credit: Tom's Hardware)

⋇ Checkerboard Matrix Design

As with other AK series CPU coolers, the AK620 Digital’s dual towers feature a checkerboard matrix design, which not only gives the device a distinctivelook but also improves total static pressure for enhanced cooling performance. 

(Image credit: Tom's Hardware)

 43mm+ RAM compatibility 

In its default configuration, the AK620 Digital has room for DDR4 & DDR5 modules up to 43mm (1.69 inches) in height. However, you can move the fan slightly higher to accommodate taller RAM – I did this on my i7-13700K system because its DDR4 was 44mm tall. 

 Two 120mm FDB fans 

There’s more to a cooler than just the heatsink or radiator. The bundled fans have a significant impact on cooling and noise levels. DeepCool has included two of its 120mm FDB fans. Like other DeepCool fans, it features arrows on the sides of the fan indicating both the direction the fans spin and which way the fan should be installed.

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ModelDeepCool FK120
Dimensions120 x 120 x 25 mm
Fan Speed500-1850 RPM +- 10%
Air FlowUp to 68.99 CFM
Air PressureUp to 2.19 mmAq
Bearing TypeFluid Dynamic Bearing
MFFT50,000 hours


Modern high-end CPUs, whether Intel or AMD, are difficult to cool in intensive workloads. In the past, reaching 95 degrees Celsius or more on a desktop CPU might have been a cause for concern. But with today’s high-end processors, it is considered normal operation. Similar behavior has been present in laptops for years due to cooling limitations in tight spaces. 

Since last fall, Tom’s Hardware has brought you cooling reviews using one of the most power-hungry desktop CPUs on the market – Intel’s flagship i9-13900K. To give you an idea of what it takes to cool Intel’s behemoth, we’ve tested it with a variety of coolers from basic low end air coolers like the Amazon Basics air cooler to high-end 420mm AIOs such as Corsair’s iCUE H170i Elite.

While it’s nice to see how Intel’s flagship responds to different levels of cooling, those results don’t always correlate with lower-tier CPUs. Today’s review features two CPUs more commonly purchased by end users – AMD’s Ryzen 7 7700X and Intel’s i7-13700K.

LGA1700 Socket Bending

Note there are many factors other than the CPU cooler that can influence your cooling performance, including the case you use and the fans installed in it. A system's motherboard can also influence this, especially if it suffers from bending, which results in poor cooler contact with the CPU. 

In order to prevent bending from impacting our cooling results, we’ve installed Thermalright’s LGA 1700 contact frame into our testing rig. If your motherboard is affected by bending, your thermal results will be worse than those shown below. Not all motherboards are affected equally by this issue. I tested Raptor Lake CPUs in two motherboards. And while one of them showed significant thermal improvements after installing Thermalright’s LGA1700 contact frame, the other motherboard showed no difference in temperatures whatsoever! Check out our review of the contact frame for more information.

Testing Methodology

All testing is performed at a 23C ambient room temperature. Multiple thermal tests are run on each CPU to test the cooler in a variety of conditions, and acoustic measurements are taken with each result. These tests include:

1. Noise normalized testing at low noise levels

2. “Out-of-the-box”/default configuration thermal & acoustics testing.

     a.) This means no power limits on Intel’s i7-13700K, and AMD’s default power limits on AMD’s Ryzen 7 7700X.

      b.) Because CPUs hit Tjmax in this scenario, the best way to compare cooling strength is by recording the total CPU package power consumption.

3. Thermal & acoustics testing in power-limited scenarios.

      a.) With Ryzen 7 7700X, I’ve tested with limits of 95W and 75W enforced.

      b.) On Intel’s i7-13700K, I’ve tested with limits of 175W and 125W enforced.

The thermal results included are for 10-minute testing runs. To be sure that was sufficiently long to tax the cooler, we tested both Thermalright’s Assassin X 120 R SE and DeepCool’s LT720 with a 30-minute Cinebench test with Intel’s i9-13900K for both 10 minutes and 30 minutes. The results didn’t change much at all with the longer test: The average clock speeds maintained dropped by 29 MHz on DeepCool’s LT720 and 31 MHz on Thermalright’s Assassin X 120 R SE. That’s an incredibly small 0.6% difference in clock speeds maintained, a margin of error difference that tells us that the 10-minute tests are indeed long enough to properly test the coolers.

Vibration Issues While Testing

The first sample of this unit I tested had issues with high-pitched vibrations which effectively made it impossible to test at noise-normalized levels because of the increased noise caused by them. Generally, DeepCool’s products perform very well when noise-normalized for quiet performance, so this was a disappointing experience.

DeepCool provided a return label for that unit to investigate the issue, and sent a replacement sample. This sample is the one I’ve shown in today’s review. But it also had issues with vibrations. Unlike the last sample where these vibrations occurred at low noise levels, this unit had these higher pitched noises occur mainly when the fans ran at full speed. 

It’s likely that DeepCool’s engineering team will determine the source of these vibration issues and address them. But as I experienced issues with two different units, it’s clear this isn’t an isolated issue.

Testing Configuration – Intel LGA1700 Platform

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CPUIntel Core i7-13700K
Comparison Coolers TestedBeQuiet! Dark Rock Pro 4 Cooler Master Master Air MA824 Stealth Cooler Master Hyper 622 Halo Cooler Master Master Liquid Core 360L Cougar Forza 85 Essential DeepCool Assassin IV DeepCool LT720 EKWB Nucleus CR360 Lux Jiushark JF13K Diamond Lian Li GA II Performance Thermalright Silver Soul 135 Thermalright Peerless Assassin Montech D24 Premium MSI CoreLiquid MEG S360 Noctua NH-D15S
MotherboardMSI Z690 A Pro DDR4
GPUIntel ARC A770 LE
CaseBe Quiet! Silent Base 802, system fans set to speed 1 setting.
MonitorLG 45GR95QE
PSUCooler Master XG Plus 850 Platinum PSU

Testing Configuration – AMD AM5 Platform

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CPUAMD Ryzen 7 7700X
MotherboardASRock B650E Taichi
GPUIntel ARC A770 LE
CaseDeepCool CK560WH
MonitorLG 45GR95QE
PSUCougar Polar X2 1200W
Albert Thomas
Freelancer, CPU Cooling Reviewer

Albert Thomas is a contributor for Tom’s Hardware, primarily covering CPU cooling reviews.

  • digitalgriffin
    It's obvious you cannot rotate the display physically as they are designed to align with the heat pipes. And there's no evidence of the software being able to rotate the display.

    This means you can't use this for rotated motherboards (ie: Thermaltake Tower 100), or horizontally placed motherboards. (Like many mATX cases)
  • Albert.Thomas
    digitalgriffin said:
    It's obvious you cannot rotate the display physically as they are designed to align with the heat pipes. And there's no evidence of the software being able to rotate the display.

    This means you can't use this for rotated motherboards (ie: Thermaltake Tower 100), or horizontally placed motherboards. (Like many mATX cases)
    That's a point I had failed to consider. You're probably right, but I'll double check and see if it is possible to change the display's orientation.
  • Albert.Thomas
    Tom Sunday said:
    My bottom-line is simply that Deepcool should have produced a cooler that is 10-15 degrees cooler than the rest of the competition and saving the cost in simply adding more blink which of course is much more cost effective and profitable. Thus offering me a 1%-2% cooling degree advantage over the others at this time around is not the way to go for my money! I want more "bang for the buck!" Is this too much to ask for?
    You don't have to buy the cooler with the bling - a "barebones" version of the AK620 is still available for a cheaper price.
  • dwd999
    Minor points: it should be made clear that the digital display requires that you have an empty usb 2.0 socket available on your motherboard. And since it has 2 fans a more valid comparison would have been to the full Noctua D-15 with 2 fans rather than the 15S single fan model.
  • ilukey77
    I have the Deepcool AK500 digital great cooler not as good as the NH-U12S even when using the Noctua's fans in a push pull config ..

    but kept my 7800x3d at about 85c in cinebench r23 all core..

    You do indeed need the spare usb 2.0 and a ARGB plug

    software is really non existent in the sense there is nothing to play around with so you cant rotate the temp for rotated motherboards you just install it and it auto opens in back ground on start up and shows the temps

    ( make sure you choose the shut down program if you uninstall the software as then you get pop up java script errors i had that for a week till support told me how to fix it )

    temps are so so accurate i mean they tell the temp but adrenalin seems to take temps in different places and like aida 64 on my jonsbo d31 lcd monitor seem to be different !!
    but all in all quite accurate with adrenalin !!

    got my AK 500 digital from ali express paid with pay pal no issues arrived fast !!

    I plan on using it on a 13600k for my all intel build with the noctua fans !!
  • MG Clark
    Tom Sunday said:
    I want more "bang for the buck!" Is this too much to ask for?

    If you want more bang for the buck, why are you buying Noctua products? For less than half the price you're paying for Noctua's dual tower coolers you can get Thermalright's dual tower coolers that come within 95% of the performance of the overpriced Noctua coolers. The Peerless Assassin SE can be had for a little over $40, and it can maintain 235W indefinitely.