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Black 240 mm radiator with two 120 mm fans, copper pump block showing a 3.5 inch colour LCD, sleeved rubber tubes

ASUS

ASUS ROG RYUJIN II 240 liquid cooler

SKU CH-26M1-PRWJA MPN ROG RYUJIN II 240

240 mm all-in-one liquid CPU cooler with a 3.5" colour LCD, Noctua iPPC-2000 PWM fans and seventh-gen Asetek pump for Intel and AMD sockets

  • TypeLiquid Cooling System
  • Block CompatibilityIntel LGA 2066 / 2011 / 2011-3 / 1700 / 1366 / 1200 / 1156 /
  • Block Dim.78.15 x 87.50 x 81.00 mm
  • Block MaterialCopper
  • Radiator Size272.00 x 121.00 x 27.00 mm
  • Radiator MaterialAluminum
  • 5" colour LCD shows live stats and custom animations via LiveDash software
  • Seventh-gen Asetek pump runs from 840 rpm for strong cooling with low noise
  • Noctua iPPC-2000 PWM fans move 71.6 CFM at 29.7 dB(A) with FanXpert control
  • Supports Intel LGA1700, LGA1200, AMD AM4, TR4 and more sockets out of the box
  • Embedded micro-fan in pump housing directs airflow onto VRM and M.2 areas

3.5" LCD liquid CPU cooler

The ASUS ROG RYUJIN II 240 is a 240 mm all-in-one liquid cooler with a built-in 3.5 inch colour LCD. It mounts on Intel LGA 2066, 2011, 2011-3, 1700, 1366, 1200, 1156, 1155, 1152, 1151, 1150 and AMD AM4 or TR4 sockets. Two Noctua iPPC 2000 PWM fans and a seventh-generation Asetek pump running from 840 rpm handle the thermal load.

Suited for monitored mainstream builds

Builders who want live temperature read-outs or custom animations on the pump head will use the LIVEDASH software and the embedded micro-fan for VRM and M.2 airflow. Systems that need a larger radiator surface, a different socket mounting kit, or a fan speed range outside 450 to 2000 rpm should look at other cooling solutions.

240 mm radiator with 380 mm tubing

The aluminium radiator measures 272 by 121 by 27 mm and the sleeved rubber tubes are 380 mm long. This single dimension set decides whether the unit fits the case and reaches the CPU socket without strain.

Highlights

  • 5" colour LCD shows live stats and custom animations via LiveDash software
  • Seventh-gen Asetek pump runs from 840 rpm for strong cooling with low noise
  • Noctua iPPC-2000 PWM fans move 71.6 CFM at 29.7 dB(A) with FanXpert control
  • Supports Intel LGA1700, LGA1200, AMD AM4, TR4 and more sockets out of the box
  • Embedded micro-fan in pump housing directs airflow onto VRM and M.2 areas

Specifications

BrandASUS
Model90RC00A0-M0AAY0
TypeLiquid Cooling System
Block CompatibilityIntel LGA 2066 / 2011 / 2011-3 / 1700 / 1366 / 1200 / 1156 / 1155 / 1152 / 1151 / 1150
AMD AM4 / TR4*
*The mounting bracket is bundled with TR4 CPU Package.
Block Dim.78.15 x 87.50 x 81.00 mm
Block MaterialCopper
Radiator Size272.00 x 121.00 x 27.00 mm
Radiator MaterialAluminum
Fan Size2 Fan Slots (120 mm)
Fan Dim.120.00 x 120.00 x 25.00 mm
Fan RPM450 - 2000 RPM +/- 10%
Fan Air Flow71.6 CFM
Fan Noise29.7 dB(A)
ColorBlack
LED ColorRGB
Tube Dim.380 mm
Tube MaterialSleeved Rubber tube
Package Contents1 x Liquid cooler (pre-applied thermal compound)
2 x 120mm fan
1 x 1 to 2 Y-cable for fan connection
1 x ARGB input cable
1 x Accesory pack of scews and brackets
1 x Quick start guide
1 x ROG sticker
1 x ROG fan controller 3M mounting tape
Shipping weight2.54 kg
Package size307 × 241 × 130 mm

Questions about this item

The Ryujin II is listed as a 240 mm model — are other radiator sizes available under the same name?

The supplier data covers only the 240 mm radiator with two 120 mm fans and 380 mm tubing; no other size is mentioned for this model.

What does the 2000 RPM top fan speed mean for actual CPU temperatures under load?

The Noctua iPPC-2000 PWM fans can reach 2000 RPM delivering 71.6 CFM at 29.7 dB(A), while the seventh-gen Asetek pump runs from 840 RPM, together moving heat from the CPU through the 272 × 121 × 27 mm aluminum radiator.

The cooler uses a 3-pin ARGB header and a 4-pin PWM fan header — what does that limit in practice?

The included Y-cable combines both 120 mm fans on one 4-pin PWM header for speed control, and the ARGB input cable connects to a standard 3-pin 5 V addressable RGB header for Aura Sync lighting control.

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