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Black AIO liquid cooler with 420mm radiator, three 140mm fans and square LCD pump block

Thermaltake

Thermaltake CL-W451-PL14SW-A 420mm liquid cooler

SKU CH-WREH-1NMW0 MPN CL-W451-PL14SW-A

A 420 mm AIO with three 140 mm PWM fans, a copper cold plate and a 3.95" square LCD on the pump block

  • TypeAIO
  • Block CompatibilityCPU Socket : Intel LGA 2066/2011-3/2011/1851/1700 1200/1156/
  • Block MaterialCopper
  • Radiator SizeDimension : 456 x 139 x 27 mm
  • Radiator MaterialAluminum
  • Fan Size3 Fan Slots (140 mm)
  • 95" square LCD shows system data and custom images
  • Magnetic MagForce 2.0 links fans without cables for clean builds
  • Three 140 mm PWM fans run 500–2000 rpm for scalable cooling
  • Copper cold plate supports Intel LGA 1851/1700/1200 and AMD AM5/AM4
  • 420 mm aluminium radiator with 460 mm rubber tubes fits large cases

420mm AIO for Intel and AMD sockets

The Thermaltake MAGFloe 420 Ultra is an all-in-one liquid cooler built around a 456 by 139 by 27 millimetre aluminium radiator and three 140 millimetre fans. It fits Intel LGA 2066 2011-3 2011 1851 1700 1200 1156 1155 1151 1150 and AMD AM5 AM4 AM3+ AM3 AM2+ AM2 FM2 FM1 platforms with a copper cold plate.

Thermals noise and power draw

Three SWAFAN EX units run at PWM 500 to 2000 RPM delivering 81.6 CFM and 3.17 mm static pressure per fan in standard orientation or 79.3 CFM and 2.73 mm in reverse. Acoustic output is 34.5 dB-A per fan with standard blades and 38.8 dB-A with reverse blades. The 460 millimetre rubber tubes connect the block to the radiator.

Square LCD and magnetic fan ecosystem

A 3.95 inch square LCD on the pump block displays images videos or system data. MagForce 2.0 uses magnetic fan-to-fan links and daisy-chain cables with enlarged pin-to-pad contacts to reduce signal drop-out. Swappable fan blades let you choose standard or reverse airflow without tools.

Highlights

  • 95" square LCD shows system data and custom images
  • Magnetic MagForce 2.0 links fans without cables for clean builds
  • Three 140 mm PWM fans run 500–2000 rpm for scalable cooling
  • Copper cold plate supports Intel LGA 1851/1700/1200 and AMD AM5/AM4
  • 420 mm aluminium radiator with 460 mm rubber tubes fits large cases

Specifications

BrandThermaltake
ModelCL-W451-PL14SW-A
TypeAIO
Block CompatibilityCPU Socket :
Intel LGA 2066/2011-3/2011/1851/1700
1200/1156/1155/1151/1150
AMD AM5/AM4/AM3+/AM3/AM2+/AM2/FM2/FM1
Block MaterialCopper
Radiator SizeDimension : 456 x 139 x 27 mm
Radiator MaterialAluminum
Fan Size3 Fan Slots (140 mm)
Fan Dim.Dimension : 140 x 140 x 25 mm
Fan RPMPWM 500~2000 R.P.M
Fan Air FlowStandard Fan Blade : 81.6 CFM (one fan)
Reverse Fan Blade : 79.3 CFM (one fan)
Fan NoiseStandard Fan Blade : 34.5 dB-A (one fan)
Reverse Fan Blade : 38.8 dB-A (one fan)
ColorBlack
LED ColorARGB
Tube Dim.Length : 460mm
Tube MaterialRubber
Shipping weight3.22 kg
Package size521 × 203 × 152 mm

Questions about this item

How do I attach the three 140 mm SWAFAN EX fans to the 420 mm radiator, and which step is most often done wrong?

Snap each fan onto the radiator using the MagForce 2.0 magnetic pins, then connect the daisy-chain cable; the step people miss is fully seating every pin so the signal does not drop out from misalignment.

Which part of this cooler will need replacement first, and when should I plan for it?

The rubber tubes are rated for 460 mm length and will eventually permeate coolant; plan to inspect them after several years and replace the whole loop if they become brittle or leak.

What thermal limit appears first when the pump and fans run at 2000 RPM continuously?

The 27 mm thick aluminum radiator with 456 x 139 mm core area saturates first, so coolant temperature rises until the 3.17 mm H₂O static pressure can no longer move heat fast enough.

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