A high-end GPU water block introduced in 2020 which was designed with thermal performance and the end-user in mind. This cooler block can be used with a range of RTX Quatro and GeForce GPUs. One years’ worth of research, calculation, experiment, CFD simulation, testing now results in the best cooling water block for the 2080Ti on the market in term of thermal performance. This block comes sealed to allow ease of installation.
Manufacture: The Nexalus GPU Vortex manifold is made of Polycarbonabte which is injection moulded at Mergon International in two parts of the main body and shower head. The Nexalus base plate is fabricated using pure copper which is first machined to high precision and then polished to a mirror finish. Finally, the copper is Electroless Nickle plated to provide corrosion and wear resistance. The water block (Manifold + Copper plate) is assembled using an aluminium plate to spread the heat and cool the GDDR6 and other hot spots.
Scientific approach: The water block is based on the use of impinging liquid jets due to this approach’s very high heat transfer coefficients and targeted cooling. All nozzles were tested for a Reynolds number range of approximately 5000 ≤ Re ≤ 10,000 to reach local heat transfer coefficients of 60 – 70 kW/m2K for a flow rate of 6 L/min. Chamfering and contouring the nozzle inlets delivered a significant decrease in the pressure drop across the nozzle plate. The locations of the jets were tailored to suit the positions of the GPU cores so that cold water is directed towards the hottest areas of the GPU integrated heat sink. After a thorough investigation of a range of jet configurations including nozzle diameter, nozzle to target spacing and nozzle length, the highest performing shower head was chosen to cool the 2080Ti. The inlet water flows into the side of the upper chamber, which homogenised the flow to deliver a uniform Reynolds number and heat transfer coefficient across each jet.
Note: The shower used in Nexalus GPU Vortex (56 holes) was chosen to fit a wide range of GPUs. Each showerhead can be customised to cool a specified GPU to have an even better performance.
Thermal interface material (TIM): The thermal interface material (TIM) has a significant impact on the performance of the cooling system and can decrease the performance by 2°C if the TIM is not applied correctly. The Hydronex thermal grease was chosen to make the thermal transfer between the IHS and the copper plate as it has a low thermal resistance and provides a reduction in GPU temperature by 1-2°C in comparison to other leading thermal greases on the market. A low viscosity readily allows this grease to be applied to the GPU, providing consistent performance after each application.
This thermal grease reacts to the heat provided by the chip and assists the spread of the grease across the chip after application. With this thermal grease, the variation in performance due to incorrect application from the user is reduced.
Thermal Pad: The different thermal pads need to be well placed to be able to make contact between the GDDR6 / other hot spots and the aluminium plate. Poor contact can reduce the performance on the GDDGR6 and other hot spots by 5-10°C. Thickness and type/number of 3M Pads (1.5mm, 2mm) gold colour one
The main features are:
• Engineering design: High heat transfer coefficient targeted at the GPU cores.
• Unmatched thermal performance: over than 1°C improved performance on Nvidia GeForce RTX 2080Ti
• Nexalus GPU Vortex water block
• TIM / Thermal Interface material: Hydronex (1g)
• Nividia GeForce RTX 2080Ti
• 2x Nickel plated brass plug G1/4”
• Thermal pads
– Nvidia GeForce RTX 2080Ti
|Plate||Copper (Nickel plated)|
|Manifold||Injection molding (Trirex 3020U)|
Vortex GPU - Server