DeepCool SPARTACUS 420 AIO Liquid CPU Cooler – 3.4in LCD, 3x140mm ARGB Fans

DeepCool SPARTACUS 420 AIO Liquid CPU Cooler – 3.4-Inch LCD, Gen 6 Pump & 3 x 140mm ARGB Fans

The DeepCool SPARTACUS 420 is a flagship 420mm all-in-one liquid CPU cooler designed for high-performance gaming PCs, enthusiast desktops and demanding workstation builds. Combining DeepCool's latest 6th-generation pump, a large 420mm-class aluminium radiator, three high-performance 140mm PWM fans and a fully customisable 3.4-inch colour LCD display, it is designed to deliver powerful CPU cooling alongside extensive system monitoring and visual customisation.

The exact R-SPT420-BKDSMP-G-1 model uses a 462 x 140 x 27mm radiator paired with three unusually thick 140 x 140 x 30mm fans. Each fan can operate from approximately 500 to 2,000RPM, supports 0RPM operation at very low PWM duty and is rated for up to 112.5 CFM airflow and 4.15mmAq static pressure.

At the centre of the cooler is a 3.4-inch 480 x 480 IPS LCD capable of displaying system information, graphs, images, animated GIFs, MP4 video and other visual content through DeepCool's DeepCreative software interface. The screen supports 16.7 million colours, up to 750-nit brightness and a 30Hz refresh rate.

DeepCool rates the SPARTACUS 420 for up to 350W of heat dissipation and supports modern Intel LGA1851 / LGA1700 and AMD AM5 / AM4 processors. A redesigned Intel offset mounting system is also intended to position the cold plate closer to the hotspot of selected high-core-count LGA1851 processors.

Model: DeepCool SPARTACUS 420   |   MPN: R-SPT420-BKDSMP-G-1   |   EAN: 6933412729648   |   Radiator: 420mm Class   |   Fans: 3 x 140mm ARGB PWM

Key Features of the DeepCool SPARTACUS 420

• 420mm-class AIO liquid CPU cooler
• 3.4-inch IPS LCD display
• 480 x 480 pixel resolution
• 750-nit maximum display brightness
• 16.7 million colours
• 30Hz display refresh rate
• Customisable modular display layouts
• Supports system monitoring, graphs, images, GIFs and MP4 video
• DeepCreative software control and customisation
• DeepCool 6th-generation pump
• Pump speed approximately 2,500–3,400RPM ±10%
• Expanded copper cold plate and optimised microfin structure
• DeepCool-rated cooling capability of up to 350W heat dissipation
• 3 x 140mm PWM fans included
• Extra-thick 30mm fan frames
• Fan speed approximately 500–2,000RPM ±10%
• 0RPM fan capability below approximately 5% PWM duty
• 112.5 CFM rated fan airflow
• 4.15mmAq rated static pressure
• Fan noise rated at up to approximately 32.89dB(A)
• Hydro-bearing fan design
• Addressable RGB lighting
• 5V 3-pin ARGB connection
• Supports Intel LGA1851 and LGA1700
• Supports AMD AM5 and AM4
• Intel hotspot-optimised offset mounting option
• DeepCool patented Anti-Leak Technology
• Single streamlined pump/display connection system
• Compact central control hub
• Magnetic removable pump/display cap
• 465mm tubing
• 5-year DeepCool limited warranty

Large 420mm Radiator for High-Performance CPU Cooling

The SPARTACUS 420 uses a large 420mm-class aluminium radiator designed to provide substantial surface area for transferring heat from the liquid cooling loop into the surrounding air.

The actual radiator dimensions are approximately:

• Length: 462mm
• Width: 140mm
• Thickness: 27mm

The term “420mm radiator” describes the cooler category and its use of three 140mm fans. It does not mean that the physical radiator is exactly 420mm long.

How Long Is the DeepCool SPARTACUS 420 Radiator?

The radiator itself is approximately 462mm long. This additional length accommodates the coolant chambers and tubing connections beyond the three 140mm fan positions.

This is important when checking case compatibility. A PC case may advertise 420mm radiator support but still have restrictions around radiator length, motherboard clearance, cable-routing space or chassis structure.

Check Your Case Supports a 420mm Radiator

The SPARTACUS 420 is considerably larger than conventional 240mm, 280mm and 360mm AIO coolers. Your case should explicitly support a 420mm radiator with three 140mm fans.

In addition to the approximately 462mm radiator length, the included fans are 30mm thick rather than the more common 25mm fan thickness.

How Much Radiator and Fan Thickness Is Required?

The radiator is approximately 27mm thick and each supplied fan is approximately 30mm thick.

Together, the radiator and fan assembly therefore requires roughly 57mm of physical thickness before allowing for screw heads, tolerances, cables and clearance around other PC components.

Always check your case manufacturer's radiator and fan-clearance specifications before ordering.

Will the SPARTACUS 420 Fit Any Case That Says 420mm?

Not necessarily. “420mm radiator support” is an important first requirement, but you should also check:

• Maximum supported radiator length
• Radiator thickness allowance
• 30mm fan clearance
• Motherboard heatsink clearance
• RAM clearance when top mounted
• GPU clearance when front mounted
• PSU shroud clearance
• Tube-routing space

The complete cooling assembly is physically larger than many mainstream AIO coolers, so compatibility should be confirmed before purchase.

DeepCool 6th-Generation Pump

The SPARTACUS 420 uses DeepCool's latest 6th-generation liquid-cooling pump platform.

The pump incorporates a 3-phase, 6-slot, 4-pole motor with Field-Oriented Control technology designed to provide smooth, responsive speed control.

Pump speed is adjustable through PWM control across an approximate range of:

• Minimum: 2,500RPM
• Maximum: 3,400RPM
• Tolerance: ±10%

Why Does Pump Speed Matter?

The pump circulates coolant between the CPU cold plate and radiator. Increasing pump speed can increase coolant flow during high thermal loads, while lower speeds can be used when less cooling capacity is required.

Actual cooling performance depends on processor heat output, radiator airflow, fan speed, case airflow, ambient temperature, mounting quality and thermal-interface conditions.

Expanded Copper Cold Plate and Microfin Design

DeepCool combines the Gen 6 pump with an expanded copper cold plate and finely optimised internal microfin geometry.

The cold plate sits directly against the CPU's integrated heat spreader and transfers processor heat into the liquid flowing through the cooling block.

The larger contact area and internal microfin structure are designed to maximise thermal transfer between the CPU and coolant.

Up to 350W Heat Dissipation Rating

DeepCool rates the SPARTACUS 420 for up to approximately 350W of heat dissipation under its specified testing conditions.

This makes it suitable for demanding high-performance desktop processors when used with a compatible socket and properly ventilated PC case.

Does 350W Mean the CPU Must Use 350 Watts?

No. The 350W figure describes DeepCool's cooling-capability rating rather than a requirement for the processor to consume 350W.

CPU power consumption and thermal output vary considerably according to processor model, BIOS settings, workload, boosting behaviour, voltage, motherboard configuration and overclocking.

Does a 350W Cooling Rating Guarantee a Certain CPU Temperature?

No. CPU temperature depends on many variables, including:

• CPU model
• CPU package power
• Ambient temperature
• Thermal paste application
• Cold-plate mounting pressure
• Pump speed
• Fan speed
• Radiator location
• Case airflow
• Motherboard settings

The manufacturer's thermal rating should therefore not be interpreted as a guaranteed operating temperature.

Three 140mm High-Performance PWM Fans

The SPARTACUS 420 includes three 140mm PWM fans specifically designed for use with the large radiator.

Each fan measures:

140 x 140 x 30mm

The extra 30mm thickness allows DeepCool to use a larger fan structure than the conventional 25mm-thick format commonly supplied with many AIO liquid coolers.

Are the SPARTACUS 420 Fans 120mm or 140mm?

They are 140mm fans.

The SPARTACUS 420 includes three 140 x 140 x 30mm fans. Some third-party product feeds incorrectly describe them as 120mm fans, but DeepCool's official technical specification identifies them as 140mm.

500–2,000RPM PWM Fan Speed

The included fans operate across an approximate PWM-controlled range of:

• 500–2,000RPM ±10%
• 0RPM when PWM duty falls below approximately 5%

PWM control allows compatible hardware and software to adjust cooling performance dynamically rather than forcing the fans to operate continuously at maximum speed.

Can the SPARTACUS 420 Fans Stop Completely?

Yes. DeepCool specifies a 0RPM mode when PWM duty falls below approximately 5%.

Whether the fans actually enter 0RPM operation depends on the selected control profile, temperatures and configuration.

112.5 CFM Airflow and 4.15mmAq Static Pressure

DeepCool specifies each fan design at up to approximately:

• 112.5 CFM airflow
• 4.15mmAq static pressure
• 32.89dB(A) maximum rated noise

High static pressure is particularly useful for radiator cooling because fans must force air through the relatively restrictive radiator fin stack.

What Is Static Pressure?

Static pressure describes a fan's ability to move air against resistance.

A radiator presents more resistance to airflow than an unrestricted open case vent, so a fan with strong static-pressure characteristics can help maintain airflow through the radiator fins.

Hydro-Bearing Fans for Smooth Operation

The included 140mm fans use hydro-bearing technology designed to provide smooth operation and long-term reliability.

DeepCool also uses a multi-phase motor design and closed-loop control within the fans to help maintain stable speed under changing operating conditions.

3.4-Inch Customisable IPS LCD Display

The SPARTACUS 420 features a large 3.4-inch IPS display integrated into the pump housing.

DeepCool specifies:

• Screen size: 3.4 inches
• Resolution: 480 x 480 pixels
• Maximum brightness: 750 nits
• Colour depth: 16.7 million colours
• Refresh rate: 30Hz

The square screen can be customised through DeepCool's software and used for both PC monitoring and visual content.

What Can the SPARTACUS 420 LCD Display?

Supported display content includes a range of system-monitoring and media options such as:

• CPU temperature
• CPU usage
• CPU frequency
• Pump speed
• GPU information
• GPU power
• RAM utilisation
• Network speeds
• Performance graphs
• Still images
• Animated GIFs
• MP4 video
• Music-spectrum visualisations

Available data depends on the system hardware, operating environment and DeepCool software support.

Customisable Modular Screen Layouts

Rather than restricting the display to one fixed information layout, DeepCool structures the screen around customisable blocks.

This allows users to combine different monitoring information and media elements according to their preferred system appearance.

Can You Show More Than One Statistic at Once?

Yes. DeepCreative supports layouts containing primary and secondary data blocks.

For example, the main area can show CPU temperature while smaller information blocks display other information such as CPU utilisation, GPU power, network speed or RAM usage.

Monitoring Mode

The monitoring view is designed to display important live system information directly on the cooler.

Typical data can include:

• CPU temperature
• CPU utilisation
• CPU frequency
• Pump RPM
• GPU power
• Memory usage
• Network activity

This can provide useful at-a-glance system information without keeping a monitoring window visible on the main computer display.

Media Mode – Images, GIFs and Video

The SPARTACUS 420 LCD can also be used as a custom visual display rather than only a hardware monitor.

DeepCool supports visual content including:

• Still images
• Animated GIF files
• MP4 video
• Music-spectrum visual effects

This allows users to coordinate the cooler with a themed PC build, personal graphics, logos or animated content.

Graph Mode for Live Performance Trends

DeepCreative can display dynamic graph blocks for system trends such as CPU usage, GPU usage, clock frequency and network traffic.

DeepCool states that graph data can update at approximately one-second intervals and can be displayed in different layout sizes.

Zen Mode Reduces Display Update Activity

DeepCreative also includes a Zen Mode designed to reduce display update frequency when the computer is under a heavier workload.

The intention is to minimise unnecessary software activity while keeping important information visible.

AI-Tuned Fan and Pump Control

DeepCool's DeepCreative interface includes automatic control profiles that the manufacturer describes as using an AI-driven control algorithm.

The software monitors CPU load and coordinates pump and fan speed according to the selected profile.

DeepCool provides several operating modes, including:

• Silence AI Mode – prioritises low-noise operation
• Performance AI Mode – prioritises stronger cooling performance
• Sleep Mode – intended for very quiet operation
• Office Mode – tuned towards quiet productivity use
• Gaming Mode – balances cooling and acoustics
• Overclocking Mode – prioritises cooling performance for demanding operation

What Happens If CPU Temperature Exceeds 80°C?

DeepCool states that in its automatic control system, the fans can switch to full speed when CPU temperature rises above approximately 80°C.

When CPU temperature returns below the threshold, fan behaviour returns to the selected preset mode.

Actual CPU temperatures and fan response can vary according to system configuration and software settings.

DeepCreative Control Software

The SPARTACUS 420 works with DeepCool's DeepCreative control interface.

The software is used to:

• Customise LCD screen layouts
• Monitor system statistics
• Select images, GIFs and video
• Display system graphs
• Configure supported cooling modes
• Control fan behaviour
• Manage supported ARGB lighting functions

The cooler remains a physical cooling device, while advanced screen and software-controlled functions require the appropriate software and motherboard connections.

Single-Connection Pump and Display Design

DeepCool has simplified wiring around the pump assembly by combining power and communication for the pump and LCD through a proprietary 10-pin connection.

This reduces the number of separate cables leaving the pump/display area and helps produce a cleaner installation.

Control is centralised through a compact hub that provides connections for the cooling and lighting system.

Why Is the Control Hub Useful?

The hub helps centralise connections rather than requiring every pump, display, fan and lighting cable to run independently across the motherboard area.

DeepCool designed the hub with flexible mounting options, including magnetic and screw-based installation.

Addressable RGB Lighting

The SPARTACUS 420 includes addressable RGB lighting designed to complement modern gaming and enthusiast PC builds.

DeepCool specifies a standard:

3-pin 5V ARGB connection (+5V-D-G)

This allows the lighting system to integrate with compatible ARGB hardware and control systems.

Can I Connect the ARGB Plug to a 12V RGB Header?

No. The SPARTACUS lighting system uses a 5V 3-pin addressable RGB connection.

Do not connect a 5V ARGB device to an incompatible 12V 4-pin RGB header. Always check the motherboard manual and connector markings before installation.

Magnetic Pump Cap with Pogo-Pin Connection

The pump/display housing uses a magnetically attached cap, allowing the display cover to be removed without conventional mounting screws.

DeepCool uses pogo-pin contacts between the removable section and cooler assembly to maintain the necessary electrical connection.

This contributes to a cleaner appearance while simplifying access during installation.

DeepCool Anti-Leak Technology

The SPARTACUS 420 incorporates DeepCool's patented Anti-Leak Technology.

An internal pressure-regulation valve is designed to respond when pressure inside the liquid-cooling loop becomes higher than atmospheric pressure.

The system is intended to regulate internal pressure and reduce the additional stresses that pressure changes can place on the sealed cooling loop.

Does Anti-Leak Technology Mean a Leak Is Impossible?

No cooling system should be described as physically incapable of leaking.

DeepCool's Anti-Leak Technology is designed to regulate internal pressure and reduce leak risk. It should not be interpreted as an absolute guarantee against every possible failure or damage scenario.

Intel LGA1851 and LGA1700 Compatibility

The SPARTACUS 420 supports:

• Intel LGA1851
• Intel LGA1700

This includes compatible modern Intel desktop processors when used with the appropriate supplied mounting hardware.

Does the SPARTACUS 420 Support Intel LGA1200?

No. DeepCool's current official compatibility specification lists Intel LGA1851 and LGA1700.

LGA1200, LGA115x, LGA2066 and older Intel sockets are not listed as supported for this exact model.

AMD AM5 and AM4 Compatibility

The SPARTACUS 420 also supports:

• AMD AM5
• AMD AM4

This provides compatibility with many AMD Ryzen desktop platforms using these sockets, subject to motherboard and chassis compatibility.

Does It Support AMD Threadripper?

No. DeepCool does not list TR4, sTRX4, sTR5 or other Threadripper sockets among the supported platforms for the SPARTACUS 420.

Intel LGA1851 Offset Mounting

DeepCool includes a newly engineered offset bracket designed specifically around the hotspot location of selected Intel LGA1851 processors.

Instead of positioning the cold plate in the conventional central location, the offset mounting option moves it upward to align more closely with the processor's primary heat-generating region.

What CPUs Is the Offset Bracket Designed For?

DeepCool specifically highlights high-core-count LGA1851 processors such as the Intel Core Ultra 9 285K and Core Ultra 7 265K.

DeepCool's internal laboratory testing reports approximately 1–3°C lower temperatures from the optimised position under its test conditions.

Results will vary between processors, motherboards, workloads and test environments.

Rear-Lock Mounting System

The SPARTACUS 420 introduces a rear-lock mounting mechanism intended to simplify installation.

The locking system allows much of the cooler fastening process to be completed from the front side while reducing visible mounting hardware around the pump block.

Always follow DeepCool's installation instructions for the exact Intel or AMD socket being used.

465mm Braided Cooling Tubes

The cooler uses approximately 465mm tubing between the pump/block and radiator.

The relatively long tubes help provide flexibility when installing the large radiator in different supported case positions.

Can the Radiator Be Mounted at the Front or Top?

This depends primarily on the PC case.

The cooler can be installed in a compatible position where the case provides sufficient 420mm radiator support, correct mounting-hole spacing, adequate 462mm radiator-length clearance and room for the 30mm-thick fans.

Always follow the case manufacturer's supported radiator orientations and DeepCool's installation guidance.

Designed for High-End Gaming PCs

The combination of a large radiator, three 140mm fans and Gen 6 pump makes the SPARTACUS 420 particularly suitable for enthusiast gaming systems using high-performance Intel or AMD CPUs.

During gaming workloads, modern processors can dynamically increase clock speeds and power consumption when thermal and electrical headroom is available.

A high-capacity cooling system can help maintain appropriate operating temperatures, although actual CPU boost behaviour also depends on the processor, motherboard, BIOS and workload.

Suitable for Content Creation and Workstations

The SPARTACUS 420 can also be useful in systems used for sustained CPU-heavy workloads such as:

• Video rendering
• 3D rendering
• Software compilation
• Photo processing
• Streaming
• Simulation workloads
• Virtualisation
• CPU-based creative applications
• High-performance workstation tasks

Long-duration workloads can generate sustained processor heat, making radiator size, case airflow and fan performance especially relevant.

SPARTACUS 420 vs 360mm AIO Coolers

A 420mm AIO uses three 140mm fan positions, whereas a typical 360mm AIO uses three 120mm fans.

The larger radiator provides more surface area for heat exchange, while the larger fans can move substantial airflow at suitable rotational speeds.

The trade-off is physical size. A 420mm cooler requires a significantly larger compatible PC case than a 240mm, 280mm or 360mm AIO.

Should I Choose 420mm or 360mm?

A 420mm cooler is particularly attractive when:

• Your case explicitly supports a 420mm radiator
• You are cooling a high-performance CPU
• You want maximum radiator surface area
• You have sufficient clearance for 140mm fans
• You prefer the larger SPARTACUS 420 layout

A 360mm AIO may be easier to fit in a wider range of cases.

Who Is the DeepCool SPARTACUS 420 Best For?

• High-end gaming PC builders
• Intel Core Ultra LGA1851 systems
• Intel LGA1700 enthusiast systems
• AMD Ryzen AM5 gaming PCs
• Compatible AMD AM4 systems
• Content creators running sustained CPU workloads
• Users who want a large customisable LCD screen
• ARGB-themed PC builds
• Users with cases specifically designed for 420mm radiators
• Enthusiasts looking for software-controlled fan and pump profiles
• Users wanting a 5-year manufacturer-backed liquid-cooler warranty

Important Things to Know Before Buying

• The SPARTACUS 420 is a large 420mm-class AIO cooler.
• The actual radiator is approximately 462mm long.
• Your case must provide appropriate 420mm radiator support.
• The radiator is approximately 27mm thick.
• The fans are approximately 30mm thick.
• Allow roughly 57mm radiator + fan thickness before additional clearance.
• The cooler includes 3 x 140mm fans, not 120mm fans.
• Intel socket support is LGA1851 and LGA1700.
• AMD socket support is AM5 and AM4.
• LGA1200 and older Intel sockets are not listed as supported.
• Threadripper sockets are not listed as supported.
• ARGB uses a 3-pin 5V connection, not a 12V 4-pin RGB header.
• Advanced LCD customisation requires the appropriate DeepCool software.
• DeepCool rates cooling capability at up to 350W under its own testing conditions.
• The 350W figure does not guarantee a specific CPU temperature.
• Check motherboard, RAM and case clearance before installation.

DeepCool SPARTACUS 420 Technical Highlights

• Brand: DeepCool
• Series: SPARTACUS
• Model: SPARTACUS 420
• Manufacturer Part Number: R-SPT420-BKDSMP-G-1
• EAN: 6933412729648
• Product Type: All-in-one liquid CPU cooler
• Colour: Black
• Radiator Class: 420mm
• Radiator Dimensions: 462 x 140 x 27mm
• Radiator Material: Aluminium
• Tube Length: 465mm
• Net Weight: Approx. 2,647g
• Pump Generation: DeepCool Gen 6
• Pump Dimensions: 99 x 91 x 65mm
• Pump Speed: 2,500–3,400RPM ±10%
• Pump Connection: 4-pin PWM
• Pump Rated Voltage: 12V DC
• Pump Rated Current: 0.29A
• Pump Power Consumption: 3.48W
• Rated Heat Dissipation: Up to approximately 350W
• Fans Included: 3
• Fan Size: 140mm
• Fan Dimensions: 140 x 140 x 30mm
• Fan Speed: 500–2,000RPM ±10%
• 0RPM Mode: Yes, below approximately 5% PWM duty
• Rated Fan Airflow: Up to 112.5 CFM
• Rated Static Pressure: Up to 4.15mmAq
• Rated Fan Noise: Up to 32.89dB(A)
• Fan Bearing: Hydro Bearing
• Fan Connection: 4-pin PWM
• Fan Rated Voltage: 12V DC
• Fan Rated Current: 0.35A
• Fan Power Consumption: 4.2W
• Lighting: Addressable RGB
• ARGB Connection: 3-pin 5V (+5V-D-G)
• LCD Size: 3.4 inches
• LCD Resolution: 480 x 480
• Display Type: IPS / TFT LCD
• Maximum Display Brightness: 750 nits
• Display Colour Depth: 16.7 million colours
• Display Refresh Rate: 30Hz
• Intel Socket Support: LGA1851 / LGA1700
• AMD Socket Support: AM5 / AM4
• Anti-Leak Technology: Yes
• DeepCreative Software Support: Yes
• Manufacturer Warranty: 5-year limited warranty

What's Included?

• 1 x DeepCool SPARTACUS 420 AIO liquid CPU cooler assembly
• 1 x 420mm-class radiator
• 3 x 140mm PWM radiator fans
• Control / connection hub
• Compatible Intel LGA1851 / LGA1700 mounting hardware
• Compatible AMD AM5 / AM4 mounting hardware
• Required installation screws and fittings
• Tube-management accessories
• Installation documentation

Why Choose the DeepCool SPARTACUS 420?

The DeepCool SPARTACUS 420 combines high-capacity liquid cooling with one of DeepCool's most advanced visual and software-control systems.

Its large 462mm radiator, three 140mm high-static-pressure fans and Gen 6 PWM pump provide a cooling platform designed around demanding modern processors, while DeepCool rates the system for up to approximately 350W of heat dissipation.

The integrated 3.4-inch 480 x 480 IPS display goes beyond basic temperature readouts by supporting custom system-monitoring layouts, performance graphs, images, animated GIFs, MP4 video and music-spectrum effects through DeepCreative.

Automatic cooling profiles can coordinate fan and pump behaviour according to CPU load, while 0RPM fan functionality provides additional flexibility during lighter workloads.

The SPARTACUS 420 also incorporates DeepCool's Anti-Leak Technology, an expanded copper cold plate, long 465mm tubing, a streamlined hub-based wiring system and dedicated offset mounting for selected high-performance Intel LGA1851 processors.

For enthusiasts building a large high-performance PC with enough room for a 420mm radiator and three 30mm-thick 140mm fans, the SPARTACUS 420 provides a combination of powerful cooling, detailed system monitoring, ARGB lighting and extensive LCD customisation in one premium AIO platform.