CPU coolers / Compare

be quiet! Pure Rock 3 vs DeepCool AK400

A

Product A: be quiet!

Pure Rock 3

34 of 54 known

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B

Product B: DeepCool

AK400

29 of 54 known

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Every value links to where we found it.

Only differences

Abe quiet! Pure Rock 3

BDeepCool AK400

General

7 of 12 differ

Series

Pure Rock7Reviewoverclocking.com/test-be-quiet-pure-rock-3-blackRead 15 October 2026The review places the cooler in the Pure Rock entry-level series of be quiet!.

Not available

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

BK0391Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026The page shows article number BK039.2Retailer pagescan.co.uk/products/be-quiet!-pure-rock-3-black-single-tower-4-heatpipes-120mm-pure-wings-3-fan-aluminium-copperRead 15 October 2026Listed as model BK039.

R-AK400-BKNNMN-G-1, R-AK400-WHNNMN-G-11Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026P/N R-AK400-BKNNMN-G-1. The AK400 page names no colour. The BK in the part number stands for black.2Maker product pageuk.deepcool.com/products/Cooling/cpuaircoolers/AK400-WH-Performance-CPU-Cooler-White/2021/15344.shtmlRead 16 October 2026White: P/N R-AK400-WHNNMN-G-1.

GTIN / EAN

42600521924812Retailer pagescan.co.uk/products/be-quiet!-pure-rock-3-black-single-tower-4-heatpipes-120mm-pure-wings-3-fan-aluminium-copperRead 15 October 2026EAN 4260052192481. Other retailer listings carry the same EAN with BK039.

6933412727446, 69334127274221Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026EAN 6933412727446.2Maker product pageuk.deepcool.com/products/Cooling/cpuaircoolers/AK400-WH-Performance-CPU-Cooler-White/2021/15344.shtmlRead 16 October 2026White EAN 6933412727422.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

25 February 20254Press articlegeektopia.es/es/technology/2025/02/25/noticias/be-quiet-anuncia-la-serie-pure-rock-3-de-refrigeraciones.htmlRead 15 October 2026Spanish article of 2025-02-25 that announces the Pure Rock 3 series, which reaches stores on 11 March. be quiet! published the news that day.

7 April 20226Press articleclub386.comRead 16 October 2026Club386 article of 7 April 2022: DeepCool unveils the AK400. DeepCool's regional release is dated 26 April 2022.

Status

Available2Retailer pagescan.co.uk/products/be-quiet!-pure-rock-3-black-single-tower-4-heatpipes-120mm-pure-wings-3-fan-aluminium-copperRead 15 October 2026On sale in the UK, listed with a price on the access date.

Available10Retailer pagestartech.com.bd/deepcool-ak400-cpu-air-coolerRead 16 October 2026Star Tech (Bangladesh) lists MPN R-AK400-BKNNMN-G-1 as In Stock with a 3 year warranty on the access date. DeepCool's page is live.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$29.96Reviewclub386.com/be-quiet-pure-rock-pro-3-reviewRead 15 October 2026The launch price table of the Pure Rock Pro 3 review lists be quiet! Pure Rock 3 Black at $29.90 / €29.90. Tax treatment is not stated.

$29.996Press articleclub386.comRead 16 October 2026The AK400 is priced from $29.99 and covered by a three-year warranty. Guru3D and Vortez give $30. Gamers Nexus lists an original MSRP of $35, which conflicts.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

€29.96Reviewclub386.com/be-quiet-pure-rock-pro-3-reviewRead 15 October 2026The same table row lists €29.90. overclocking.com also gives the announced price of 29.90 EUR. Whether VAT is included is not stated.7Reviewoverclocking.com/test-be-quiet-pure-rock-3-blackRead 15 October 2026The review says be quiet! announces a price of 29.90 EUR for the Black model.

€34.95Press releaseit.deepcool.com/company/pressroom/newsrelease/2022/16278.shtmlRead 16 October 2026Prezzo: AK400 MSRP 34,90 euro IVA inclusa and AK400 WH MSRP 39,90 euro IVA inclusa. This is the Italian release, and the price includes VAT. The UK release gives 34.99 GBP for both. The Black row inherits the base 34.9. The White row has 39.9.

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

Not available

ColoursiThe maker's own colour names

Black1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026The spec table lists Color Option: Black.

Black, White2Maker product pageuk.deepcool.com/products/Cooling/cpuaircoolers/AK400-WH-Performance-CPU-Cooler-White/2021/15344.shtmlRead 16 October 2026AK400 WH is the white edition of the same cooler.

Cooler typeiAir is a heatsink with fans that sits on the CPU. AIO liquid is a sealed all-in-one liquid cooler with a pump block, tubes and a radiator.

Air2Retailer pagescan.co.uk/products/be-quiet!-pure-rock-3-black-single-tower-4-heatpipes-120mm-pure-wings-3-fan-aluminium-copperRead 15 October 2026The product title calls it a Performance Air CPU Cooler.

Air1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Air cooler with one 120 mm fan.

Air cooler layoutiAir coolers only. Top-flow covers low-profile coolers whose fan blows down onto the board.

Single tower2Retailer pagescan.co.uk/products/be-quiet!-pure-rock-3-black-single-tower-4-heatpipes-120mm-pure-wings-3-fan-aluminium-copperRead 15 October 2026The product title says Single Tower.

Single tower1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Text: a four heat pipe tower layout. The launch release calls it a compact single tower CPU cooler.

Rated TDP (claimed)iThe heat load the maker says the cooler handles. Makers do not share one test method, so this is not a measured result. A maker's maximum heat dissipation power counts. Check the maker's CPU compatibility page too.

190W1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026The spec table lists TDP (W) 190.3Press articlethefpsreview.com/2025/02/26/be-quiet-launches-the-pure-rock-3-series-including-the-first-be-quiet-double-tower-air-coolers-for-entry-level-systemsRead 15 October 2026The press release says a high 190W TDP cooling capacity.5Retailer pageldlc.pro/fiche/PB00672696.htmlRead 15 October 2026TDP Max. CPU 190 W.

220W1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Overview text: up to 220W of heat dissipation efficiency. The DeepCool TDP and socket compatibility list also shows 220W for AK400.

Base materialiThe surface that touches the CPU: the heatsink base or the AIO cold plate. Plating counts, so nickel-plated copper is not copper. Direct-touch heat pipes are the contact surface, so they count as copper unless plating is stated. The direct-contact heat pipes field records the design.

Copper1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026The shop copies be quiet!'s own spec table: Base Material Aluminum / Copper and CPU Contact Surface Heat pipe direct touch. The direct-touch heat pipes are the contact surface and the table names no plating, so copper is stored.4Press articlegeektopia.es/es/technology/2025/02/25/noticias/be-quiet-anuncia-la-serie-pure-rock-3-de-refrigeraciones.htmlRead 15 October 2026The heatsink has four copper heat pipes of 6 mm.

Nickel-plated copper4Press releaseuk.deepcool.com/company/pressroom/newsrelease/2022/16285.shtmlRead 16 October 2026Text: the polished nickel-plated construction, and four 6mm direct touch copper heat pipes. Hardware Busters lists the heat pipe material as Copper (Nickel Plating). Direct-touch pipes are the contact surface, so the plating makes it nickel-plated copper.9Reviewhwbusters.com/cooling/deepcool_ak400_aircooler_reviewRead 16 October 2026Technical Specifications: Heatpipes Material: Copper (Nickel Plating).

Thermal pasteiPre-applied means paste is already on the base or cold plate. Included means a separate tube or syringe in the box.

Pre-applied1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Thermal Grease (Type) Applied. It lists no paste syringe. overclocking.com confirms the paste is pre-applied.7Reviewoverclocking.com/test-be-quiet-pure-rock-3-blackRead 15 October 2026The review says the thermal paste is pre-applied.

Pre-applied1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Overview: High thermal resistance paste is pre-applied.7Reviewkitguru.net/components/cooling/luke-hill/deepcool-ak400-cpu-cooler-reviewRead 16 October 2026No tube of thermal paste is supplied, as it is pre-applied to the cooler's base.

Compatibility

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CPU socketsiSockets the maker lists as supported in its spec table, compatibility list or guide, written as cpu_socket writes them, e.g. AM5 or LGA1851. List each socket on its own, so LGA115x becomes LGA1150, LGA1151, LGA1155 and LGA1156. When the maker names the sockets of such a family, list only the ones it names. A socket that needs a separately sold or requested mounting kit is left out. A new socket that the maker lists with no extra kit counts. LGA2011-v3 and 2011(V3) are written LGA2011-3. Threadripper sockets use AMD's names, so TR4 is written sTR4 and TR5 is written sTR5. sTRX4 and sWRX8 are sockets of their own.

AM5, AM4, LGA1851, LGA1700, LGA1200, LGA1155, LGA1151, LGA11501Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Intel 1851 / 1700 / 1200 / 1150 / 1151 / 1155 and AMD AM5 / AM4. LGA1156 appears in some retailer lists but not in this table, so it is not stored.4Press articlegeektopia.es/es/technology/2025/02/25/noticias/be-quiet-anuncia-la-serie-pure-rock-3-de-refrigeraciones.htmlRead 15 October 2026Mounting hardware for LGA 1150, 1151, 1155, 1200, 1700, 1851, AM4 and AM5, the same list as the spec table.5Retailer pageldlc.pro/fiche/PB00672696.htmlRead 15 October 2026AMD AM4, AM5, Intel 1150, 1151, 1155, 1200, 1700 and 1851.

AM5, AM4, LGA1851, LGA1700, LGA1200, LGA1155, LGA1151, LGA11501Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Application for Intel LGA1851/1700/1200/1151/1150/1155 and AMD AM5/AM4. The manual names LGA1200, LGA1151, LGA1150 and LGA1155 for the older Intel sockets.3Owner's manualdeepcool.com/download/pdf/AK400.pdfRead 16 October 2026Installation chapters: Intel LGA1200/1151/1150/1155, Intel LGA1851/1700 and AMD AM5/AM4.

RAM height clearanceiAir coolers only. The tallest memory module that fits under the cooler with all included fans in their standard position. When the maker gives different values per socket, store the lowest and name the others in the source note. A heatsink that does not reach over the memory slots has no height limit, so the field is left out and the maker's statement goes in the source note.

Not available

Not available

Offset mountingiThe included mount can shift the base or cold plate off the socket centre, for example toward the AM5 hotspot. An asymmetric heatsink on a centred base does not count.

Yes1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Key features: Offset mounting for better performance on latest AMD Ryzen CPUs.3Press articlethefpsreview.com/2025/02/26/be-quiet-launches-the-pure-rock-3-series-including-the-first-be-quiet-double-tower-air-coolers-for-entry-level-systemsRead 15 October 2026The press release says offset mounting for better compatibility with the latest AMD Ryzen CPUs is supported.7Reviewoverclocking.com/test-be-quiet-pure-rock-3-blackRead 15 October 2026The review describes an offset mounting position for AMD Ryzen 3000 to 9000 CPUs. The cooler's base itself is not off-centre.

Not available

Heatsink

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Heat pipesiAir coolers only. Number of heat pipes. A U-shaped pipe with two ends in the fins counts as one. A T-shaped pipe with three ends, such as Cooler Master's 3DHP, also counts as one. The maker's count wins over a review or Cybenetics count.

41Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Heatpipe Number / Diameter 4 / 6 mm.3Press articlethefpsreview.com/2025/02/26/be-quiet-launches-the-pure-rock-3-series-including-the-first-be-quiet-double-tower-air-coolers-for-entry-level-systemsRead 15 October 2026Four 6mm heat pipes with HDT technology.

41Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Technical spec: Heatpipe 6 mm x 4 pcs.4Press releaseuk.deepcool.com/company/pressroom/newsrelease/2022/16285.shtmlRead 16 October 2026Four 6mm direct touch copper heat pipes.

Heat pipe diameteriAir coolers only. Outer diameter, such as 6 or 8.

6mm1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Heatpipe Number / Diameter 4 / 6 mm.3Press articlethefpsreview.com/2025/02/26/be-quiet-launches-the-pure-rock-3-series-including-the-first-be-quiet-double-tower-air-coolers-for-entry-level-systemsRead 15 October 2026Four 6mm heat pipes with HDT technology.

6mm1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026

Direct-contact heat pipesiAir coolers only. The heat pipes touch the CPU directly instead of sitting in a solid base plate.

Yes1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: CPU Contact Surface Heat pipe direct touch.7Reviewoverclocking.com/test-be-quiet-pure-rock-3-blackRead 15 October 2026The review says the four 6 mm heat pipes are mounted in direct contact with the processor.

Yes1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Text: Core Touch Technology 2.0 improves direct-touch heatpipe coldplates.4Press releaseuk.deepcool.com/company/pressroom/newsrelease/2022/16285.shtmlRead 16 October 2026Four 6mm direct touch copper heat pipes.

Liquid cooling

None of 7 known

Radiator sizeiAIO coolers only. The nominal size class from the fan positions, such as 240, 280, 360 or 420.

Not available

Not available

Radiator dimensionsiRadiator without fans. Length runs along the row of fans. Width runs across it. Thickness is the depth the airflow passes through, such as 27 or 38.

Not available

Not available

Radiator material

Not available

Not available

Tube lengthiLength of each tube between the pump block and the radiator, as published. When the two tubes differ, the shorter is stored and the other goes in the source note.

Not available

Not available

Max pump speediHighest rated pump speed. When the maker gives a range, this is its top.

Not available

Not available

Pump power connectoriHow the pump gets power. A pump wired through a supplied hub or cable uses the plug at the motherboard or PSU end. A pump powered from SATA with a separate 3-pin speed lead is SATA power.

Not available

Not available

VRM faniA small fan on the pump block that blows over the motherboard voltage regulators.

Not available

Not available

Fans

1 of 2 differ

Included fansiFans in the box that cool the heatsink or radiator, one row per fan model. A VRM fan on the pump block is left out. Speed, airflow, pressure and noise are the maker's figures for one fan at full speed, in the fastest mode and without a low-noise adapter. When a range is published, the top of the range is stored. Count is the number of rotors, so a unified frame with three 120 mm rotors counts 3 with size 120. Min speed is the lowest speed while spinning. A zero RPM stop is not stored. FDB and S-FDB are fluid dynamic. HDB is hydrodynamic. Cooler Master's Loop Dynamic Bearing is loop dynamic. If the maker gives airflow only in m³/h, convert with 1 m³/h = 0.5886 CFM, round to one decimal and say so in the source note. Connector is the fan's power lead. A separate lighting lead is not counted, and a maker cable or adapter in the box that ends in a 4-pin PWM plug counts as 4-pin PWM, even when the fan's own lead is proprietary. For an air cooler with one fan, the maker's noise figure for the cooler is the fan noise. A figure the maker does not label per fan or in total counts as per fan. When a maker table prints noise for the whole cooler with no per-fan label and the maker's own data sheet for the same fan gives a figure, the fan data sheet figure is stored.

Abe quiet! Pure Rock 3

Model	Size (mm)	Fans	Max speed (rpm)	Airflow (CFM)	Static pressure (mmH₂O)	Noise (claimed) (dB(A))	Bearing	Connector
Pure Wings 3 120mm PWM	120	1	2,000	59.6	2.41	31.2	Rifle	4-pin PWM

Source1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Number of Fans 1, Pure Wings 3 120mm PWM, 120 x 25 x 120 mm, 2000 rpm at 100% PWM, 59.6 cfm / 101.2 m3/h, 2.41 mm H2O, rifle bearing, 4-pin PWM connector. Overall noise level at 50 / 75 / 100% is 12.4 / 24.4 / 31.2 dB(A). With one fan, 31.2 dB(A) is stored as the fan noise. The maker gives no minimum speed. overclocking.com prints 2.42 mmH2O for the static pressure, and the maker's 2.41 is stored.

BDeepCool AK400

Model	Size (mm)	Fans	Min speed (rpm)	Max speed (rpm)	Airflow (CFM)	Static pressure (mmH₂O)	Noise (claimed) (dB(A))	Bearing	Connector
FC120P	120	1	500	1,850	66.47	2.04	29	Fluid dynamic (FDB)	4-pin PWM

Source1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Technical spec: fan 120 x 120 x 25 mm, speed 500~1850 RPM +/-10%, airflow 66.47 CFM, air pressure 2.04 mmAq (read as mmH2O), noise <= 29 dB(A), 4-pin PWM, fluid dynamic bearing, 12 VDC 0.13 A. The overview calls the 500-1850 RPM the dynamic PWM range. The page gives no fan model name and no fan count. One fan is in the box, per the manual.3Owner's manualdeepcool.com/download/pdf/AK400.pdfRead 16 October 2026Parts page: one fan (B x1) and four fan clips, two for a second fan.9Reviewhwbusters.com/cooling/deepcool_ak400_aircooler_reviewRead 16 October 2026Technical Specifications: Fan Model: FC120P (DF1202512CM). The model name FC120P is stored.

FansiNumber of included heatsink or radiator fans.

1=CalculatedFrom Included fans

1=CalculatedFrom Included fans

Display and lighting

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RGB lightingiLighting on the fans, the heatsink or the pump block.

No1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Lighting Connector No. The cooler is sold as the Black model without lighting. The LX model has the ARGB fan.

No7Reviewkitguru.net/components/cooling/luke-hill/deepcool-ak400-cpu-cooler-reviewRead 16 October 2026The review says DeepCool opts not to run any form of RGB lighting on the all-black fan.

Lighting standardiThe named lighting connection. ARGB lighting alone does not prove a 5 V header. Proprietary means the maker's own hub or cable system.

Not available

Not available

Built-in screeniA screen on the pump block or the heatsink. LCD and OLED screens show images. A segment readout shows digits only, such as the CPU temperature.

None1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026The spec table lists no screen.

None7Reviewkitguru.net/components/cooling/luke-hill/deepcool-ak400-cpu-cooler-reviewRead 16 October 2026The review describes a plain heatsink and fan with no screen.

Screen sizeiDiagonal of the built-in screen.

Not available

Not available

Screen resolution

Not available

Not available

SoftwareiThe maker's software for lighting, the screen or the pump. Software that works with the cooler out of the box. Software that needs a separately sold controller is left out.

Not available

Not available

Needs a USB headeriThe cooler needs an internal USB 2.0 header on the motherboard for software control, sensors or the screen. A wireless receiver that plugs into any USB port does not count.

No7Reviewoverclocking.com/test-be-quiet-pure-rock-3-blackRead 15 October 2026Installation steps: the fan plugs into the CPU_FAN header of the motherboard. No USB cable or software is mentioned.

No3Owner's manualdeepcool.com/download/pdf/AK400.pdfRead 16 October 2026The wiring step shows only the 4-pin CPU_FAN or CPU_OPT header. No USB connection is shown.

Measured

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Cybenetics THETA, AMD AM5iThe THETA level for this cooler's class on the Cybenetics AMD AM5 platform with a Ryzen 9 7900X. It is rated at 30 dB(A) normalized noise, or at 25 dB(A) for a cooler that cannot reach 30 dB(A). No level means tested without a level. A cooler that Cybenetics did not test on this platform is left out. A report with a heading for this platform but no results counts as not tested.

Bronze8Measurementcybenetics.com/evaluations/coolers/112Read 15 October 2026Report BQCLR00112 is titled be quiet! Pure Rock 3 (tested 17 to 23 Nov 2025). Its fan is the Pure Wings 3 120mm High-Speed, with 4 heatpipes of 6 mm and 71 x 124 x 154 mm, which match the BK039. THETA Bronze, Air, rated at 30 dB(A) on a Ryzen 9 7900X with the Default mount. It was evaluated under protocol revision 1.8, before Revision 2.0.

Not available

Cybenetics THETA, Intel LGA1851iThe same rating on the Cybenetics Intel LGA1851 platform with a Core Ultra 9 285K. A cooler that Cybenetics did not test on this platform is left out. A report with a heading for this platform but no results counts as not tested.

Silver8Measurementcybenetics.com/evaluations/coolers/112Read 15 October 2026THETA Silver, Air, rated at 30 dB(A) on a Core Ultra 9 285K with the Default mount.

Not available

Overall performance at 30 dB(A), AM5 (measured)iThe Cybenetics Overall Performance score at 30 dB(A) normalized noise on the AMD AM5 platform. It is average CPU power times average CPU frequency divided by average CPU temperature. Higher is better. A cooler rated only at 25 dB(A) has no value here.

9,4168Measurementcybenetics.com/evaluations/coolers/112Read 15 October 2026Overall Performance 9,416 at 30 dB(A) on a Ryzen 9 7900X.

Not available

Overall performance at 30 dB(A), LGA1851 (measured)iThe same score on the Cybenetics Intel LGA1851 platform. Scores from the two platforms are not comparable with each other.

12,7568Measurementcybenetics.com/evaluations/coolers/112Read 15 October 2026Overall Performance 12,756 at 30 dB(A) on a Core Ultra 9 285K.

Not available

Noise at 100% fan setting (Cybenetics)iThe Cybenetics noise at the 100% fan setting, measured 1 m from the cooler in a hemi-anechoic chamber, with the pump of an AIO at full speed. Other reviewers' noise goes in the thermal test rows.

29.4dB(A)8Measurementcybenetics.com/evaluations/coolers/112Read 15 October 202629.4 dB(A) at the 100% fan setting (2068 rpm). Hemi-anechoic chamber with a 6 dB(A) noise floor, Bruel & Kjaer 2270 G4 sound analyser, microphone 1 m from the cooler per the protocol.

Not available

Thermal tests (measured)iReviewer results, one row per test condition. Rows compare only when the test CPU, load, power and noise level match. The source note names the reviewer, ambient temperature, case or open bench, and thermal paste. Test CPU is the CPU name only, such as AMD Ryzen 9 7900X. The power limit and mode go in the load. Above ambient is stored only when the reviewer publishes it, never computed from the ambient.

Abe quiet! Pure Rock 3

Test CPU	Load	CPU power (W)	Fan setting	Noise (dB(A))	CPU temperature (°C)	Above ambient (°C)
AMD Ryzen 9 7900X	Prime95 Small FFTs, full CPU load, PBO enabled	170.6	20 dB(A)	20	95.1	Not available
AMD Ryzen 9 7900X	Prime95 Small FFTs, full CPU load, PBO enabled	174.8	25 dB(A)	25	95.1	Not available
AMD Ryzen 9 7900X	Prime95 Small FFTs, full CPU load, PBO enabled	175.9	30 dB(A)	30	95.1	Not available
AMD Ryzen 9 7900X	Prime95 Small FFTs, full CPU load, PBO enabled	175.9	100%	29.4	95.1	Not available
Intel Core Ultra 9 285K	Prime95 Small FFTs, full CPU load, Intel Default Mode	294.9	20 dB(A)	20	101.9	Not available
Intel Core Ultra 9 285K	Prime95 Small FFTs, full CPU load, Intel Default Mode	295.3	25 dB(A)	25	99.9	Not available
Intel Core Ultra 9 285K	Prime95 Small FFTs, full CPU load, Intel Default Mode	296.6	30 dB(A)	30	97.8	Not available
Intel Core Ultra 9 285K	Prime95 Small FFTs, full CPU load, Intel Default Mode	296.6	100%	29.4	97.8	Not available
AMD Ryzen 9 7900X	Fixed CPU power of 65 W	65	100% (2000 rpm)	Not available	Not available	18.3
AMD Ryzen 9 7900X	Fixed CPU power of 65 W	65	66% (1300 rpm)	Not available	Not available	20.9
AMD Ryzen 9 7900X	Fixed CPU power of 65 W	65	33% (650 rpm)	Not available	Not available	29.1
AMD Ryzen 9 7900X	Fixed CPU power of 105 W	105	100% (2000 rpm)	Not available	Not available	42.7
AMD Ryzen 9 7900X	Fixed CPU power of 105 W	105	66% (1300 rpm)	Not available	Not available	47.4
AMD Ryzen 9 7900X	Fixed CPU power of 105 W	105	33% (650 rpm)	Not available	Not available	66.1
AMD Ryzen 9 7900X	Fixed CPU power of 170 W	170	100% (2000 rpm)	Not available	Not available	64.1
AMD Ryzen 9 7900X	Fixed CPU power of 170 W	170	66% (1300 rpm)	Not available	Not available	67.9
Intel Core i5-13600KF	Fixed CPU power of 65 W	65	100% (2000 rpm)	Not available	Not available	24.2
Intel Core i5-13600KF	Fixed CPU power of 65 W	65	66% (1300 rpm)	Not available	Not available	25.8
Intel Core i5-13600KF	Fixed CPU power of 65 W	65	33% (650 rpm)	Not available	Not available	32.5
Intel Core i5-13600KF	Fixed CPU power of 125 W	125	100% (2000 rpm)	Not available	Not available	46.8
Intel Core i5-13600KF	Fixed CPU power of 125 W	125	66% (1300 rpm)	Not available	Not available	52.6
Intel Core i5-13600KF	Fixed CPU power of 125 W	125	33% (650 rpm)	Not available	Not available	67
Intel Core i5-13600KF	Fixed CPU power of 170 W	170	100% (2000 rpm)	Not available	Not available	66.3
Intel Core i5-13600KF	Fixed CPU power of 170 W	170	66% (1300 rpm)	Not available	Not available	72

Source7Reviewoverclocking.com/test-be-quiet-pure-rock-3-blackRead 15 October 2026overclocking.com review of 2025-03-11, values read from the bar charts. Temperatures are the delta between the CPU and the ambient temperature, which the review does not state. Fan speed is set by the motherboard at 100%, 66% and 33%, measured at 12 V, 8 V and 5 V as 2000, 1300 and 650 rpm. AMD: Ryzen 9 7900X at 65, 105 and 170 W. Intel: Core i5-13600KF at 65, 125 and 170 W. The charts have no 33% bar for the cooler at 170 W, so no row is stored for it. The review says some coolers could not hold the CPU at the highest power. The review charts noise in dB with no weighting or distance, so no noise value is stored. Its text does not name the load program or the paste. The review text credits the offset mount for the AM5 results.8Measurementcybenetics.com/evaluations/coolers/112Read 15 October 2026Cybenetics Cooling Solutions Test Protocol, revision 1.8 procedure: ambient 25 C and 30% humidity in a climate chamber, open bench (Cooler Master Test Bench for the Asus TUF Gaming X670E-Plus, DimasTech Bench for the ASRock Z890 Taichi), Prime95 Small FFTs at each noise level, CPU power measured at the EPS connectors, Arctic MX-4 paste for all tests, default mount. The first four rows are AMD and rows five to eight are Intel. The CPU hits its temperature limit in all rows. The report publishes no temperature above ambient. The 100% rows repeat the 30 dB(A) results because full speed is 29.4 dB(A).

BDeepCool AK400

Test CPU	Load	CPU power (W)	Fan setting	Noise (dB(A))	Above ambient (°C)
AMD Ryzen 5 3600	68 W overclocked heat load, noise-normalized test, Gamers Nexus cooler test bench	68	35 dB(A)	35	39
AMD Ryzen 5 3600	68 W overclocked heat load, Gamers Nexus cooler test bench	68	100%	39	38
AMD Ryzen 9 5950X	Cinebench R23 looped for 30 minutes, manual overclock 4.45 GHz all-core at 1.312 V, steady state, Fractal Design Meshify 2 case	Not available	100%	42	68
AMD Ryzen 9 5950X	Cinebench R23 looped for 30 minutes, manual overclock 4.45 GHz all-core at 1.312 V, steady state, Fractal Design Meshify 2 case	Not available	40 dB(A)	40	69

Source7Reviewkitguru.net/components/cooling/luke-hill/deepcool-ak400-cpu-cooler-reviewRead 16 October 2026Luke Hill, 26 April 2022. Ryzen 9 5950X manually overclocked to 4.45 GHz all-core at 1.312 V on a Gigabyte B550 Aorus Master in a Fractal Design Meshify 2 case with four 140 mm case fans. Cinebench R23 looped for 30 minutes, steady-state CPU temperature at the end. Ambient is held at 22 to 24 C. The review calls the numbers delta temperature, stored as the rise over ambient. At 100 percent fan speed (1850 RPM) the noise was 42 dBA and the delta 68 C. Set to 40 dBA, which took a 90 percent duty cycle at about 1750 RPM, the delta was 69 C. CPU power and the paste are not stated. The noise measurement distance is not stated.8Reviewgamersnexus.net/coolers/best-cheap-cpu-coolers-benchmarked-deepcool-ak400-reviewRead 16 October 2026Gamers Nexus, review of 3 July 2022, updated 11 March 2024. The 68 W test is an overclocked Ryzen 5 3600 on an MSI MEG X570 Ace, using the cooler's included fan and the Gamers Nexus standardized method. At a normalized 35 dBA (fan at 80 percent) the CPU ran 39 C over ambient. At 100 percent fan speed it ran 38 C over ambient at 39 dBA. The review's 123 W results (59 C and 58 C over ambient) are not stored because the text does not name the CPU used. Ambient and the paste are not stated in the review text.

Dimensions and weight

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DimensionsiAir coolers only. The cooler with its included fans in the standard position, without the mounting kit. Height runs from the bottom of the base to the top. Depth runs along the airflow, fans included. Width runs across the fins. Map by direction, not by letter. Width runs across the fins, depth runs along the airflow. DeepCool's 129 x 138 x 160 mm (L x W x H) is width 129, depth 138, height 160.

Width124Height154Depth71mm(4.9 × 6.1 × 2.8 in)1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Dimensions Without Mounting Material (L x W x H) 71 x 124 x 154 mm, so depth 71, width 124 and height 154, fan included.4Press articlegeektopia.es/es/technology/2025/02/25/noticias/be-quiet-anuncia-la-serie-pure-rock-3-de-refrigeraciones.htmlRead 15 October 2026Size 154 mm x 124 mm x 71 mm.5Retailer pageldlc.pro/fiche/PB00672696.htmlRead 15 October 2026Height 154 mm, width 124 mm and depth 71 mm with fan. Depth without fan is 46 mm.

Width127Height155Depth97mm(5 × 6.1 × 3.8 in)1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Product Dimensions 127 x 97 x 155 mm (L x W x H), read as width 127, depth 97, height 155 by the DeepCool rule in the dimensions help. The launch release says 153 mm without the removable top cover.4Press releaseuk.deepcool.com/company/pressroom/newsrelease/2022/16285.shtmlRead 16 October 2026Specifications table: product dimensions 127 x 97 x 155 mm, with 153 mm when the removable top cover is taken off. The text says RAM modules with large heatsinks fit without problems due to 100% RAM clearance, so no RAM height limit is stored.

Heatsink dimensionsiAir coolers only. The heatsink without fans, as the maker lists it. Map by direction, not by letter. Width runs across the fins, depth runs along the airflow. DeepCool's 129 x 138 x 160 mm (L x W x H) is width 129, depth 138, height 160. A heatsink depth that equals the depth with fans includes the fan, so that axis is not stored.

Width124Height154Depth46mm(4.9 × 6.1 × 1.8 in)1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Heatsink Dimensions (L x W x H) 46 x 124 x 154 mm. The depth of 46 mm differs from the 71 mm with fan, so it is the heatsink alone.

Width120Height152Depth45mm(4.7 × 6 × 1.8 in)1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Heatsink Dimensions 120 x 45 x 152 mm (L x W x H): width 120, depth 45, height 152. Depth 45 differs from the 97 mm with the fan, so it is stored.4Press releaseuk.deepcool.com/company/pressroom/newsrelease/2022/16285.shtmlRead 16 October 2026Specifications table: heatsink dimensions 120 x 45 x 152 mm.

WeightiAn air cooler with its included fans. An AIO cooler as one unit with pump block, tubes, radiator and fans. Mounting hardware is left out when the maker states it separately. When one maker figure may include the mounting kit, such as a press release net weight above the product page figure, the product page figure is stored. An RGB edition can weigh a little more or less, so it is per variant.

570g(1.3 lb)1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Total Weight 0.57 kg. The page's Additional information row says 0.85 kg, which is a shipping figure, and the package gross weight row is not usable. Cybenetics lists 590 g. The maker's 570 g is stored.4Press articlegeektopia.es/es/technology/2025/02/25/noticias/be-quiet-anuncia-la-serie-pure-rock-3-de-refrigeraciones.htmlRead 15 October 2026Weight 570 g.5Retailer pageldlc.pro/fiche/PB00672696.htmlRead 15 October 2026Weight 570 g.

661g(1.5 lb)1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026Net Weight 661 g. Club386 says the 661 g is with the fan installed.4Press releaseuk.deepcool.com/company/pressroom/newsrelease/2022/16285.shtmlRead 16 October 2026Specifications table: net weight 661 g.6Press articleclub386.comRead 16 October 2026With the fan installed, the AK400 dimensions become 127 x 97 x 155 mm and the total weight 661 g.

Heatsink weightiAir coolers only. The heatsink without fans.

Not available

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In the box

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In the boxiItems supplied with this exact model, verbatim.

Not available

Heatsink x1, Fan x1, Intel backplate x1, Mounting plate x1, Fan clip x4, Intel LGA1200/115X standoff x4, Intel LGA1851/1700 standoff x4, Intel screw x4, AMD standoff x4, AMD screw x43Owner's manualdeepcool.com/download/pdf/AK400.pdfRead 16 October 2026Parts pages A to J with quantities: heatsink x1, fan x1, backplate x1, mounting plate x1, fan clips x4, LGA1200/115X standoffs x4, LGA1851/1700 standoffs x4, Intel screws x4, AMD standoffs x4 and AMD screws x4. The manual names no part, so the names are read from the installation drawings. KitGuru and Hardware Busters confirm the four fan clips and the mounting hardware.

Links

Not compared

Product page

www.bequiet.com/en/cpucooler/55919Maker product pagebequiet.com/en/cpucooler/5591Read 15 October 2026Product page of the BK039. bequiet.com blocks agents, so it was not opened. The maker's spec table was read in a retailer copy (Computer Assistance) and the launch press release in a copy at The FPS Review.

www.deepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtml1Maker product pagedeepcool.com/products/Cooling/cpuaircoolers/AK400-Performance-CPU-Cooler-1851-1700-AM5/2024/15222.shtmlRead 16 October 2026

Spec sheet

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Not available

Manual

Not available

www.deepcool.com/download/pdf/AK400.pdf3Owner's manualdeepcool.com/download/pdf/AK400.pdfRead 16 October 2026AK400 Series manual, 24 pages, drawings only. It covers AK400, AK400 WH and AK400 ZERO DARK. The PDF is dated August 2024.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

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Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

3years1Retailer pagecomputerassistance.co.uk/product/be-quiet-pure-rock-3-cpu-cooler-universal-socket-pure-wings-3-pwm-fan-2000rpm-only-31-2dba-at-maximum-fan-speed-190w-tdp-3-year-manufacturers-warrantyRead 15 October 2026Spec table: Warranty 3 Years.3Press articlethefpsreview.com/2025/02/26/be-quiet-launches-the-pure-rock-3-series-including-the-first-be-quiet-double-tower-air-coolers-for-entry-level-systemsRead 15 October 2026All Pure Rock 3 coolers come with a 3-year manufacturer's warranty.5Retailer pageldlc.pro/fiche/PB00672696.htmlRead 15 October 2026Commercial warranty 3 years from the maker.

3years4Press releaseuk.deepcool.com/company/pressroom/newsrelease/2022/16285.shtmlRead 16 October 2026Both the AK400 Series and AK620 series Air Coolers are backed by a three-year warranty. The market is not named.6Press articleclub386.comRead 16 October 2026Covered by a three-year warranty.

Both are also in the API. Back to all CPU coolers.