We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black 240 mm AIO with square LCD pump head and two 120 mm RGB fans

NZXT

NZXT RL-KR240-B1 Kraken 240 RGB liquid cooler

SKU CH-451B-JB3R4 MPN RL-KR240-B1

A 240 mm all-in-one liquid CPU cooler with a 1.54" LCD screen, two 120 mm fluid-dynamic-bearing fans and a 2800 RPM pump, compatible with Intel LGA 1700/1200/115X and AMD AM5/AM4 sockets

  • Radiator size123 × 275 × 30 mm
  • Fan size2 Fan Slots (120 mm)
  • Compatible socketsIntel Socket LGA 1700 & 1200/115X AMD Socket AM5, AM4, sTRX4
  • AMD socket supportAMD Socket AM5, AM4, sTRX4*, TR4* (*Threadripper bracket not
  • Intel socket supportIntel Socket LGA 1700 & 1200/115X
  • Block dimensionsDiameter: 74.7 mm H: 55.97 mm

Fan Size 2 Fan Slots (120mm)

Color Black

  • Real-time system stats or custom images on a 1.54" LCD display
  • Quiet, high-static-pressure cooling from two 120 mm FDB fans at up to 1800 RPM
  • 7th-gen Asetek pump runs at 2800 RPM for strong heat dissipation
  • Single breakout cable and nylon-braided tubing simplify installation
  • NZXT CAM software controls fan and pump speeds with 0 RPM mode

240 mm AIO for LGA 1700 and AM5 builds

The Kraken 240 RGB is an all-in-one liquid cooler with a 240 mm aluminium radiator and two 120 mm fluid-dynamic-bearing fans. It mounts on Intel LGA 1700, 1200 and 115X sockets as well as AMD AM5, AM4 and Threadripper platforms, though the Threadripper bracket is not included. The copper cold plate measures 74.7 mm in diameter and 55.97 mm tall.

LCD block and reinforced tubing

A 1.54 inch circular LCD on the pump head shows custom images or live system data through NZXT CAM software. The 7th-generation Asetek pump runs up to 2800 RPM while the fans operate between 500 and 1800 RPM, moving 78.86 CFM at a maximum of 33.88 dBA. Nylon-braided sleeves protect the tubing for easier handling.

Single-cable install and software control

One breakout cable connects pump, fans and RGB lighting to simplify motherboard headers. CAM software lets you set fan and pump curves, including a 0 RPM mode at low temperatures. The 275 mm radiator length and 30 mm thickness need matching case clearance, and the 4-pin PWM fan connectors require compatible headers. Builders needing a Threadripper bracket or a larger radiator must source those separately.

How it compares

Measured against everything we stock in Liquid Cooling & AIO Coolers, at today’s prices. Recalculated every night.

Price $139.99
Pricier than about 79% of the 1,190 comparable items (median $71.99).

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNZXT
Product lineKraken
Model nameKraken 240 RGB Black
Part numberKraken 240 RGB Black
Product typeRL-KR240-B1
Product colorBlack
Performance
Fan speed500-1,800 ± 180 RPM
Fan airflow78.86 CFM
Ports & slots
Fan plug type4-pin PWM
Size & build
Radiator size123 × 275 × 30 mm
Fan size2 Fan Slots (120 mm)
Block dimensionsDiameter: 74.7 mm H: 55.97 mm
Cooling block materialCopper
Radiator materialAluminum
Fan dimensions120 × 120 × 26 mm
Bearing designFluid Dynamic Bearing
Shipping weight1.98 kg
Package size327 × 244 × 141 mm
Compatibility
Compatible socketsIntel Socket LGA 1700 & 1200/115X
AMD Socket AM5, AM4, sTRX4*, TR4* (*Threadripper bracket not included)
AMD socket supportAMD Socket AM5, AM4, sTRX4*, TR4* (*Threadripper bracket not included)
Intel socket supportIntel Socket LGA 1700 & 1200/115X
Environment & compliance
Fan noise level33.88 dBA
More details
LED lightingRGB

Other versions of this model

5 more in the same range

Questions about this item

Will the Kraken 240 RGB fit my existing Intel LGA 1200 motherboard and case?

The cooler supports Intel LGA 1200 sockets. Its radiator measures 123 x 275 x 30 mm and uses two 120 mm fans, so check your case clearance for a 240 mm radiator.

How can I verify the pump and fans are running correctly after installation?

The 1.54" LCD shows real-time system data. In NZXT CAM you can monitor the pump at 2800 RPM and fans between 500-1800 RPM, plus confirm airflow of 78.86 CFM at 33.88 dBA.

Does the box include mounting hardware for AMD AM5 and the two F120RGB Core fans?

The package contains the water block with pre-applied paste, 240 mm radiator, two 120 mm F120RGB Core fans, Intel LGA 1700/1200/115X and AMD AM5/AM4 brackets, and a single breakout cable.

More in Liquid Cooling & AIO Coolers

Similar items