EK Water Blocks EK-Quantum Surface X420M White
EK Water Blocks

EK Water Blocks EK-Quantum Surface X420M White

SKU HC-487319MPN 3831109839690

  • 420 mm
  • 58 mm thick
  • Copper

Highlights

  • 58mm thick copper core with 18 FPI non-louvered fins
  • Four G1/4 ports plus a fifth for drain and bleed
  • Supports six 140mm fans with included M4 screws
  • EK-Matrix7 compatible for aligned tubing runs
  • Low flow restriction allows multiple radiators on one pump
  • Modular end caps enable easy disassembly and modding

Key specs

Size
420 mm
Thickness
58 mm
Material
Copper
Color
White
Fin Density (FPI)
18 FPI
Pressure tested (up to)
1 Bar
All specifications
$129.99
  • ≈ 0.001702 BTC
  • ≈ 0.05739 ETH
  • ≈ 130.15 USDT

In stock Ships by Tue, Nov 10 when paid today.

  • Delivery to the United States: $39.90 DHL Express Worldwide · arrives Wed, Nov 11 – Mon, Nov 16 if paid today
  • Rate locked at checkout Up to 60 min to send BTC, 30 min for ETH and USDT
  • New, sealed and genuine Full manufacturer warranty
  • 30-day returns Unused items in original packaging
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Overview

A 420mm white radiator built for high-performance custom loops. Its 58mm thickness and copper core suit builders who need maximum heat dissipation with medium to high-speed fans.

Design and Materials

The radiator measures 465mm long, 145mm wide, and 58mm high, weighing 2.42kg. Stainless-steel side plates carry a semi-matte white coating, while copper fins feature a black matte finish. Extruded aluminum end caps with a silver accent cover the internals and add structural rigidity.

Performance and Use

Eighteen 2mm copper tubes and high-grade fins deliver strong thermal transfer with low airflow restriction. EK recommends medium to high-speed fans or push-pull configurations; slow fans are not advised. The multipass design keeps coolant flow restriction minimal, so a single D5 or DDC pump can drive several radiators.

Connectivity and Compatibility

Five G1/4 ports are provided: four on the main end tank and one on the opposite end for draining and bleeding. Modular plugs in the end caps let you reroute connections as needed. The unit mounts six 140mm fans using the supplied black M4 screws and fits standard 25mm-thick fan frames.

Ecosystem Integration

EK-Matrix7 standardization aligns port positions and dimensions with other Quantum components such as Reflection² distro plates. This makes tubing runs parallel and simplifies swapping between S, P, and X series radiators in supported cases.

EK-Quantum Surface X420M White specifications

General
BrandEK Water Blocks
Manufacturer part no.3831109839690
EAN3831109839690
Radiator Specifications
Fin Density (FPI)18 FPI
Pressure tested (up to)1 Bar
Type
Radiator typeMultipass
Fan Support
Fan Compatibility6x 140 mm
Fan / radiator mountingM4 thread
Water Cooling
Water cooling connectors5x G1/4"
Lighting
Lighting / RGBNo
Color
Primary ColorWhite
Secondary ColorBlack
Main radiator color (cage)White
Main radiator color (fins)Black
Materials
MaterialsAluminum, Brass, Copper, Stainless steel
Heat Sink MaterialCopper
Dimensions
Length / Depth465 mm
Width145 mm
Height58 mm
Weight2.42 kg
Radiator Size420 mm

Specifications come from the manufacturer and can change without notice. Check the box contents and compatibility before ordering; our team answers questions within one business day.

Shipping & returns

Delivery to the United States: $39.90DHL Express Worldwide · arrives Wed, Nov 11 – Mon, Nov 16 if paid today

Ships from our warehouse in Germany: in stock, it leaves within 1–2 business days, tracked to the door.
ToBusiness daysThis item
GermanyDHL Paket1–2$5.90
Other EU countriesDHL Parcel International2–8$11.90–$15.90
UK, Switzerland and NorwayDHL Parcel International3–7$24.90
United States and CanadaDHL Express Worldwide2–5$39.90
Asia and the Middle EastDHL Express Worldwide2–5$49.90
Australia and New ZealandDHL Express Worldwide3–6$59.90
  • Discreet packaging Plain, unbranded box — no crypto or brand references outside
  • Returns 30 days for unused items in original packaging; faulty items are on us
Rates and delivery times by country

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