NZXT Kraken Core 420 black AIO liquid CPU cooler, three-quarter view

NZXT Kraken Core 420 black AIO liquid CPU cooler, fan-side view of the radiator and pump

NZXT Kraken Core 420 black AIO liquid CPU cooler, top-down view

NZXT Kraken Core 420 black AIO liquid CPU cooler, radiator standing upright beside the pump

NZXT Kraken Core 420 black AIO liquid CPU cooler, close-up of the semi-transparent pump cap

NZXT Kraken Core 420 black AIO liquid CPU cooler, copper cold plate and mounting bracket

NZXT Kraken Core black shown in a completed build behind tempered glass. Components other than the cooler are sold separately.

NZXT Kraken Core black, left side view of a completed build. Components other than the cooler are sold separately.

Kraken Core 420

420 mm AIO Liquid CPU Cooler with Static Pressure Fan

Key Specs

Type: AIO Liquid CPU Cooler
Radiator: 454 x 142 x 30 mm
Fan: static pressure single-frame fan, F420P (3x 140 mm)
Cold plate: 60 x 60 mm copper, pre-applied thermal paste
Tubing: EPDM with nylon braided sleeve, 460 mm
Pump: Asetek Gen 9V
Compatibility: Intel LGA 1954 / 1851 / 1700 · AMD AM5, AM4
Color: Black
Lighting: none
Warranty: 6 years

Inside the Box

Kraken Core 420
F420P Fan
Installation accessories

Warranty & Return Policy

Warranty coverage — See NZXT warranty terms by product
Returns & exchanges — NZXT components and accessories are sold through authorized retailers. Start a return or exchange with the retailer you purchased from.
Warranty service — Submit a request to NZXT Support. Proof of purchase from an authorized NZXT retailer is required.

Overview

Kraken Core 420 is built around an Asetek pump and a copper cold plate. A single-frame static pressure fan pushes air through dense radiator fins, thermal paste comes already applied, and a semi-transparent pump cap reveals concentric rings layered inside — all in a build with nothing to light up or manage. One fan cable, no controllers. Cooled by Asetek.

Asetek Gen 9V pump
Copper cold plate with thermal paste pre-applied
Semi-transparent pump cap — concentric rings layered inside
Magnetic NZXT logo face piece with 4-way orientation, always upright
Static pressure single-frame fan — one cable to route
Aluminum radiator on nylon-braided tubing
420 mm radiator
No controllers required, and no lighting to manage

Cooled by Asetek.

A quiet pump on a copper cold plate

Asetek’s new Gen 9V pump is built to run quiet, with a pump design that keeps vibration from reaching the case, on a copper cold plate with the thermal paste already applied.

Built Simple. Built Right.

A translucent cap reveals concentric rings layered inside, and the magnetic NZXT logo face piece offers 4-way orientation, so it sits upright whichever way the pump is mounted.

NZXT Kraken Core 360 radiator with a single 4-pin fan cable callout

One fan. One cable.

A single-frame fan tuned to push air through dense radiator fins, on fluid dynamic bearings — three 120 mm fans on the 360, three 140 mm on the 420, on one cable.

NZXT Kraken Core black in a completed build, with a close-up of the nylon-braided tubing. Components other than the cooler are sold separately.

Clean lines, tight routes.

Aluminum radiator, braided tubing

An aluminum radiator paired with nylon-braided tubing: the sleeve keeps the lines tidy where they run through the build, and the tubing bends to a tight route without kinking.

NZXT Kraken Core copper cold plate with Intel and AMD mounting brackets

Fits your platform.

Intel and AMD, both sizes

Pre-applied thermal paste, a motherboard-direct connection and broad Intel and AMD socket support — the same on the 360 and the 420, and both carry a six-year warranty.

NZXT Kraken Core 360 radiator standing upright beside the pump

Nothing to manage.

One fan cable, no controller

No lighting to sync and no hub or controller to install. The fan runs on one 4-pin PWM cable straight to the motherboard, using the fan settings already in place.

The pump is Asetek. The rest is NZXT.

Who builds what

Asetek has built all-in-one liquid coolers since 2000 and supplies the Gen 9V pump. NZXT builds everything around it: the cap, the radiator, the fan and the finish.

Close-up of the NZXT Kraken Core pump cap showing the concentric rings inside

Rings with depth.

Rings molded inside the cap

The cap is semi-transparent, so the concentric rings molded inside read with real depth, and the NZXT logo face piece lifts off magnetically.

NZXT Kraken Core 360 and 420 side by side, from above

Start here.

Two sizes, one design.

Same Asetek pump, same cap. Kraken Core 360 for broad case compatibility, Kraken Core 420 for maximum cooling headroom. Pick the size your case takes and find it at a retailer near you.

Tech Specs

Cooler Type

All-in-One Liquid CPU Cooler

Radiator Size

420 mm

Asetek Gen 9V

Motor Speed

1,200 – 3,000 ± 300 RPM

Connector (Control)

1x 4-pin PWM (via Motherboard)

Power Rating

12 V DC, 0.45 A, 5 W

Height

66.7 mm (2.63 in)

Faceplate

Magnetic, 4-way Orientation

Cap Material

Plastic

Dimensions

60 x 60 mm (2.36 x 2.36 in)

Material

Copper

Dimensions (L x W x H)

454 x 142 x 30 mm (17.87 x 5.59 x 1.18 in)

Material

Aluminum

Length

460 mm (18.11 in)

Material

EPDM tube with nylon braided sleeve

Model

F420P Fan

Dimensions

420 x 140 x 25 mm (16.54 x 5.51 x 0.98 in)

Quantity

Speed

500 – 1,800 ± 180 RPM

Airflow

87.7 CFM per fan

Static Pressure

3.99 mmH₂O per fan

Noise Level

37.3 dBA per fan

Power Rating

12 V DC, 0.80 A, 9.6 W

Connector (Control)

1x 4-pin PWM (via Motherboard)

Bearing

Fluid Dynamic Bearing (FDB)

Lifespan

60,000 hours

Cable Length

1x 600 mm

Materials

Plastic, rubber, PCB

Intel®

Intel® Socket LGA 1954 / 1851 / 1700, Intel® Core™ Processors

AMD® Socket AM5, AM4, AMD Ryzen™ Processors

Warranty

6 years

Model Number

RL-KC242-BN (Black)

815671019226 (Black)

5056547203447 (Black)

Frequently Asked Questions

Does the Kraken Core include a fan?

Yes — a single-frame static pressure fan sized to match the radiator, with a single cable to route.

Does it have RGB lighting?

No. These models are built for clean, lighting-free builds, with no lighting to manage.

Which sockets are supported?

Intel LGA 1954, 1851 and 1700, plus AMD AM5 and AM4. Mounting hardware for all of them is included, with thermal paste pre-applied.

What’s in the box?

The cooler, its single-frame fan and installation accessories, with thermal paste already applied.

What’s the difference between the 360 and the 420?

Radiator and fan size. The 360 pairs a 360 mm radiator with three 120 mm fans; the 420 pairs a 420 mm radiator with three 140 mm fans. The pump, cap and six-year warranty are the same.