Aquacomputer Cuplex Kryos NEXT sTRX4 FC - Acetal (21821)

The Aquacomputer Cuplex Kryos NEXT sTRX4 FC - Acetal (21821) is a full cover CPU water block for AMD sockets sTRX4 and sTR5/SP6, with a black acetal case and a nickel-plated copper base. This version has no lighting.

Properties

Sockets

sTR5, SP6, sTRX4, sWRX8, TR4, SP3

Top

Acetal, black

Base

Copper, nickel-plated

Ports

2x G1/4, 69 mm distance between threads

Dimensions

approx. 117 x 77 x 16 mm (without screws)

Full cover for third generation Threadripper

As already mentioned in the name, FC means Full Cover: the copper base covers the entire processor. Aquacomputer adapted the block to the revised chip layout of the third generation of Threadripper CPUs. Thermal energy is concentrated in certain areas of the chip, so an optimized internal coolant flow aims maximum cooling performance at the areas where it is generated.

Base part with microstructure

All parts are CNC machined at Aqua Computer's headquarters in Germany. The huge cooling structure covers 51 x 45 mm and has the finest structure size that Aqua Computer has to offer, a spacing of less than 0.2 mm. Aquacomputer names it as one reason for what it calls exceptional cooling performance. The contact area is machined with increased precision and polished, and the copper base is finished with nickel plating.

Retention system and thermal paste

Aquacomputer calls the mounting system ingenious, and it makes installation look very easy. On the processor, retractable springs and screws with a defined stop ensure even contact pressure. Thanks to the Kryonaut heat conducting paste from Thermal Grizzly, 1 gram in a syringe with a plastic spatula, the assembly is efficiently rounded off. The paste has a high thermal conductivity and, due to its low viscosity, spreads thin and evenly.

Acetal or acrylic

This block keeps the optical system plain: the case is solid black acetal, with no LEDs and no lighting connector. In contrast, the acrylic version of the same block is rounded off with acrylic and RGBpx LEDs. Its acrylic panel not only offers a view of the interior, but also lets the addressable lighting shine.

What the loop needs

Two G1/4 threads take two fittings. Supply the coolant through the upper fitting: a reversed flow direction significantly decreases cooling performance. Aquacomputer requires Double Protect Ultra as the coolant, for corrosion inhibition.

Notes

• Run the water cooling system first with no other PC components on the mains supply, and check the block and fittings for leakages.
• Spread a thin layer of the grease with the spatula; seat each screw one or two revolutions, then tighten all four alternately.

In the box

• 1x Water block
• 1x Mounting material (screws, springs, etc.)
• 1x Thermal compound Thermal Grizzly Kryonaut, approx. 1 gram in syringe
• 1x Plastic spatula
• 1x Instruction manual

Aquacomputer's manual covers mounting, flow direction and the approved coolant; the technical data and the scope of delivery are listed above.