Renowned German overclocking enthusiast Der8auer has developed a liquid cooling system for NVIDIA RTX 5090 Founders Edition (FE). The task was complicated by the new graphics card’s design.
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Water block for NVIDIA RTX 5090 FE
As known, the RTX 5090 FE’s electronics are composed of three printed circuit boards (PCBs) and use liquid metal as a thermal interface. These technical differences make creating or modifying liquid cooling systems for it challenging. Der8auer’s prototype managed to reduce the GPU temperature from 73.8°C to 43.8°C.
The water block is entirely made of copper, including the cooling plate and external cover. It was designed as a proof of concept and styled minimalistically yet neatly. The transparent glass cover allows visibility of the liquid flowing past the plate. The cooling element itself is crafted from 14 mm-thick copper and features multiple channels to cool the large GB202 chip.
The liquid block occupies two slots and matches the length and height of the RTX 5090 FE’s stock cooler. This design is necessitated by the ribbon cable connecting the card’s outputs to the main board, which likely cannot be folded without damage. Without this constraint, the block might have resembled traditional liquid coolers more closely.
Despite the engineering challenges, the water block delivered exceptional results during testing. Der8auer recorded a 30°C drop in GPU temperature and a 38°C reduction in memory temperature compared to the stock cooler. The enthusiast plans to produce these liquid coolers for sale but notes that securing a reliable mounting solution for the slot remains a critical hurdle.
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