Sycom’s water-cooled RTX 5090: Combining performance and silence

Japanese manufacturer Sycom has once again shown that it can come up with a solution that goes beyond the traditional offerings of NVIDIA’s partners. The Sycom RTX 5090 Hydro LC Plus targets users who want top performance without the noise. Sycom has bet on premium AIO water cooling, complete with Noctua fans. This makes the entire card feel like a product designed for those who want maximum stability, efficiency, and long-term reliability.

Water cooling as the basis of the entire design

The dominant feature of the Sycom RTX 5090 Hydro LC Plus is its water circuit. Sycom reached for a 14.17 inches AIO radiator, which it complemented with a trio of Noctua NF-A12x25 G2 fans. These fans are among the best in the static pressure category, which is key with dense radiators. They excel with precision construction, quality bearings and minimal vibration, which allows them to keep temperatures low even under prolonged load.

Liquid circulation is taken care of by the Asetek 6365-M2 pump – a generation of Asetek solutions known for reliability and stable flow. The water circuit is closed by Lynk piping , designed to minimize heat loss. At full load, the card stays around 62°C (143.6 °F) with a noise level of approximately 40.8 dBA, a difference from traditional air RTX 5090s that routinely exceed 80°C (176 °F) and are noticeably noisier. The card itself occupies a dual-slot, but mounting the heatsink requires a case with room for the 14.17 inches format.

Blackwell architecture and performance that remains stable even under long loads

At the heart of the graphics card is a next-generation chip based on the Blackwell architecture . This is the same foundation that powers all RTX 5090 models, but in the case of the Hydra LC Plus, water cooling can make the most of this core.

The graphics work with massive computing power, which is supported by a high number of shader units and a throughput memory configuration. Sycom has retained the full width of the memory bus and fitted fast GDDR7 memory, which creates extremely high memory throughput and stability when working with large textures, 4K or 8K content and compute workloads.

The core holds high clock speeds even during long gaming or rendering sessions. AIO cooling helps eliminate thermal limits, so the GPU doesn’t suffer from frequency drops even under sustained 100% load. Power is provided by a single 16-pin connector, and the card operates on a high power budget. However, water cooling keeps VRAM temperatures under control, which has a positive impact on both longevity and stability.

Sycom RTX 5090 Hydro LC Plus Availability

This version of the RTX 5090 is only available as part of Sycom’s finished kits in Japan. The manufacturer does not offer it separately, as they tune the entire hydro circuit directly for their PCs. This is a limited and technically exceptional design aimed at low temperatures and quiet operation.

Summary

The Sycom RTX 5090 Hydro LC Plus shows that extreme performance doesn’t have to mean extreme temperatures or high noise levels. AIO water cooling with premium Noctua and Asetek components takes the culture of operation to the next level. The Blackwell architecture can work to its full potential even under long-term 100% load thanks to its stable thermal profile.

While limiting sales to builds may bother some users, it also ensures that the card will always be part of a system that will use it to its full potential. For enthusiasts of silent and powerful kits, this is a solution that is hard to find direct competition on the market.

NVIDIA GeForce RTX 5090

GeForce RTX 5090 delivers extreme performance for 4K gaming, content creation, and AI workloads. Check current prices and available models.