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EK-Quantum Reaction AIO RX 6800/6900 D-RGB P240 - AMD Radeon Edition

Product EAN: 3831109833353
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If you are a bit apprehensive about your liquid cooling, and you don’t want to fiddle with water yourself, EK has a solution – a custom made, pre-filled, heavy-duty, maintenance-free, All-In-One liquid cooler for your new Radeon RX 6000 series graphics card. As with all of the other AMD Edition water blocks, this one is no different with its custom-made fans, custom-assembled fittings, and the additional AMD branding on the side of the radiator core unit. All you have to do is install the water block to your GPU and crunch some FPS.

The EK-Quantum Reaction AIO RX 6800/6900 D-RGB P240 – AMD Radeon Edition is a pre-filled radiator-pump combo unit. It features a high-fin density EK-CoolStream radiator, high-static pressure EK-Vardar EVO 120ER D-RGB - Special Edition fans, and a high-quality custom liquid cooling grade SPC water pump. It sets the foundation for efficient and silent PC cooling in use with the EK-Quantum Vector RX 6800/6900 D-RGB – AMD Radeon Edition is a high-performance full-cover water block.


EK-Quantum Vector RX 6800/6900 is a special edition 2nd generation Vector GPU water block from the EK® Quantum Line. It is made for graphics cards based on the latest AMD® RDNA2™ architecture. This water block fits reference PCB designs of the Radeon RX 6800, RX 6800 XT, and RX 6900 XT GPUs. For a precise compatibility match of this water block, we recommend you refer to the EK Cooling Configurator.

Special Edition EK-Quantum Vector RX 6800/6900 water block for reference AMD Radeon RX 6800 and 6900 GPUs

The Special Edition block stands out thanks to the black acetal top with aesthetic side-slopes that mimic the new graphics cards’ factory cooler. The top also features an ultra-clean, screwless design because the assembly is done from the backside of the block. The Radeon logo is illuminated by a dense addressable RGB strip allowing for a smooth D-RGB effect.

EK-Quantum Vector RX 6800/6900 water block is compatible with reference design Radeon RX 6800, RX6800XT, and 6900 graphics cards. This Special Edition Vector water block directly cools the GPU, VRAM, and the VRM (voltage regulation module) as a cooling liquid is channeled right over these critical areas. The water block is in contact with power stages as well as Inductor chokes to maximize cooling and minimize the chances of coil whine. 

These newly developed water blocks feature optimized flow paths that reduce hydrodynamic instabilities and vortexing (dead spots) inside of them. The EK-Quantum Vector Series water blocks use an Open Split-Flow cooling engine design, which proved to be a superior solution for GPU water blocks. It is characterized by low hydraulic flow restriction, meaning it can be used with weaker water pumps or pumps running on low-speed settings, and still achieve top performance. The jet plate and fin structure geometry have been optimized to provide even flow distribution with minimal losses and optimal performance when used in any given coolant flow orientation. 

Included Backplate 

The included backplate improves the overall aesthetics of your graphics card, and also provides additional passive cooling for the GPU core and backside of the printed circuit board VRM and VRAM section.

EK-Vardar EVO 120ER D-RGB

EK-Vardar EVO 120ER D-RGB fans feature a unique Start-Stop function that ensures the user a true 0db noise environment. When the fan curve is set to the minimum threshold point below 25-30% PWM duty cycle (depending on the motherboard model), the motor and the electronics will turn off and the fan will simply stop spinning. EK-Vardar EVO restarts operation automatically as fan control ramps up its operational duty cycle past the threshold start-stop point. This feature is very useful for preventing radiator dust buildup in idling PCs and to prolong the lifecycle of the fan itself.


- EK-Quantum Vector RX 6800/6900 Special Edition GPU water block
- EK-Quantum Vector RX 6800/6900 Special Edition backplate
240mm Radiator and Pump Unit - AMD Edition
EK-Vardar EVO 120ER D-RGB (2pcs)
- Standard self-tapping fan mounting screws

Technical specifications:

- Dimensions: 295 x 133 x 68mm (L x W x H)
- Fan type: EK-Vardar EVO 120ER D-RGB 2200 RPM (+/- 10%)
- Pump type: EK-SPC 60A 12V DC PWM Pump

- Tube length: 400mm
- Fitting type radiator: 10mm Barb fitting
- Fitting type GPU block: 10/16mm HDC fitting
- Coolant type: EK-CryoFuel Clear

This AIO is compatible with the following GPUs:

- AMD Radeon RX 6800 Reference
- AMD Radeon RX 6800 XT Reference
- AMD Radeon RX 6900 XT Reference

Assembled in Slovenia, EU.


  • If PWM cable is not connected to the motherboard, pump and fans will work at maximum speed. 
  • It is normal for the EK-Vardar EVO D-RGB fan to stop spinning at low workload and during PC idling. 
  • The 0db Start-Stop function PWM threshold might vary from motherboard to motherboard model and even source PWM header.
  • The minimal rotation speed of the fan might vary from motherboard to motherboard model and even source PWM header.
  • For best results, EK recommends using the CPU_FAN header as the PWM signal source for controlling the fan. 

Additional Info

Material / Design / Color option Nickel Acetal
Threads G1/4
Sockets AMD
Chip Manufacturer AMD Radeon

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