IceGiant at the 2025 International CES showed us their ProSiphon TITAN series CPU coolers for workstations and gaming desktops. These are closed loop liquid CPU coolers based on the ProSiphon technology IceGiant innovated. It works on the fluid siphon technology, where a thermal gradient in the loop drives coolant instead of a pump. Heat dissipates more efficiently to the coolant, and there's no crackling noise from the pump. The only downside to this are that the siphon tubes are rigid and you have to plan your build well.

There were two models on display. The TITAN-TR 360 is designed for AMD Socket SP5 or sTR5, which seats Ryzen Threadripper 7000 series workstation processors, which is a testament to the technology. Some of the processor models in the Threadripper WX7000 series come with TDP as high as 350 W. The other cooler shown is the ProSiphon TITAN 360, which is designed for mainstream desktop CPU socket types, such as AM5 and LGA1851. The cooler can tame high-power flagship chips from Intel and AMD, such as the top-spec Ryzen 9 9000X3D series with their 170 W TDP and 230 W PPT, or the Core Ultra 9 285K with its 125 W base- and 250 W maximum turbo power. IceGiant is backing the coolers with lifetime warranty, although the included fans come with 6-year warranties. The company says that the cooler will outlast the fan, unlike in the case of pump-based CLCs that give in to pump wear and structural degradation over time.To give you a perspective of how well the ProSiphon TITAN-TR 360 performs, below is a screenshot from a workstation powered by a Ryzen Threadripper PRO 7995WX that's been idling all day at 214 W on the socket, and drawing up to 680 W at peak load. The average temperatures were recorded at under 46°C.