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Black 280 mm radiator with two 140 mm ARGB fans and copper water block with rotating blade indicator

RAIJINTEK CO., LTD

RAIJINTEK ORCUS 280 RBW liquid cooler

SKU CH-M591-ZTETF

A 280 mm all-in-one CPU cooler with an external ceramic-axis pump, copper micro-channel block and two 140 mm ARGB PWM fans

  • Radiator size311 × 138 × 28 mm
  • Fan size2 Fan Slots (140 mm)
  • Compatible socketsIntel LGA 2066 / 201x / 1366 / 1200 / 115x / 775 (Core i3 /
  • Block dimensions54 × 54 mm
  • Cooling block materialCopper
  • Pump dimensions33 × 69.5 × 40 mm
  • Copper micro-channel block maximises heat transfer from CPU
  • External pump isolates vibration and runs at 25 dBA max
  • Rotating ARGB blade shows coolant flow and level
  • Two 140 mm PWM fans deliver 65.19 CFM airflow
  • Broad socket support covers Intel LGA 2066 to 775 and AMD AM4 to AM2

Purpose-built AIO for mainstream CPUs

The RAIJINTEK ORCUS 280 RBW is an all-in-one liquid CPU cooler built around a 280 mm radiator and two 140 mm ARGB PWM fans. It targets builders who want a self-contained loop with addressable lighting and broad socket coverage for current Intel and AMD platforms.

External pump, ceramic bearing, hydraulic fans

The pump sits outside the cold plate, using a ceramic-axis bearing rated for 25 dBA maximum noise and a flow rate of 84 L/H at 4500 RPM. Two 140 mm hydraulic-bearing fans spin between 400 and 1500 RPM, delivering up to 65.19 CFM at 30 dBA while the radiator measures 311 x 138 x 28 mm.

Copper micro-channel block

The 54 x 54 mm copper base uses 0.1 mm micro-channels for direct liquid flow and integrates a transparent rotating blade that shows coolant movement and level. The unit includes mounting hardware for Intel LGA 2066, 201x, 1366, 1200, 115x, 775 and AMD AM4, AM3+, AM3, AM2+, AM2, FM2+, FM2, FM1 sockets.

How it compares

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

Price $57.99
Cheaper than about 58% of the 1,190 comparable items (median $71.99).

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Specifications

Product
Brand nameRAIJINTEK
Product lineORCUS
Model name0R10B000901
Product typeAll-in-One CPU water cooler
Product colorBlack
Performance
Fan speed400–1500 +/- 10% RPM
Fan airflow65.19 CFM (Max.)
Ports & slots
Fan plug type4 Pin
Size & build
Radiator size311 × 138 × 28 mm
Fan size2 Fan Slots (140 mm)
Block dimensions54 × 54 mm
Cooling block materialCopper
Pump dimensions33 × 69.5 × 40 mm
Radiator materialAluminum
Fan dimensions140 × 140 × 25 mm
Bearing designHydraulic Bearing
Tube sizeID - 5 mm / OD - 10.6 mm
Compatibility
Compatible socketsIntel LGA 2066 / 201x / 1366 / 1200 / 115x / 775 (Core i3 / i5 / i7 / i9 CPU)
AMD Socket AM4 / AM3+ / AM3 / AM2+ / AM2 / FM2+ / FM2 / FM1
In the box
In the boxAccessories:
1 x ARGB-PWM control hub
1 x Remote Controller
1 x Connect cable
Environment & compliance
Pump noise level25 dBA (Max.)
Fan noise level30 dBA (Max.)
More details
Pump bearingCeramic Axis
Pump capacity84 L/H
LED lightingARGB

Questions about this item

How is the external pump mounted and what step is often missed?

The pump sits outside the case and connects to the 12 V header; the step often missed is securing the 33 x 69.5 x 40 mm pump body so vibration does not transfer to the motherboard.

What maintenance will the cooler need later?

The unit is refillable; check coolant level through the rotating blade window and top up via the fill port when the fluid drops below the visible mark.

What limit appears first during a long heavy load?

The 280 mm aluminum radiator with two 140 mm fans maxes out at 65.19 CFM airflow and 30 dBA, so thermal capacity hits the ceiling before pump flow of 84 L/H becomes the bottleneck.

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