IceGiant Shows Off AIO CLCs Powered by ProSiphon Technology—No Pumps

[btarunr]

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.



View at TechPowerUp Main Site

 

[phanbuey]

I love how it says high perofmance "No" next to traditional air cooling... where the D15 and Thermalright Phantom Spirit are regularly beating 240mm clcs.

I would love to see a review of this vs a high end air cooler.

 

[Vya Domus]

Every year we see one of these, they never seem to make it to market.

 

[Fouquin]

Every year we see one of these, they never seem to make it to market.

Their previous generation came out some 3 years ago, and is available for purchase on their website and at some retail stores. This new generation is up for pre order already on their site, but they want $420-$600 for it.

 

[ymdhis]

Noctua demonstrated one of these on Computex just half a year ago. I hope these will become the new stock cooling solutions, and they will come in 120mm size for SFF builds (real SFF, not the 40cm long nvidia meme SFF).

 

[qlum]

I love how it says high perofmance "No" next to traditional air cooling... where the D15 and Thermalright Phantom Spirit are regularly beating 240mm clcs.

I would love to see a review of this vs a high end air cooler.

The warranty section, even worse, tower coolers like that, last as long as the fans spin, both have fans so the argument really does not hold up. Fans also only have 6 years

They talk warranty, but that's just silly.

 

[R0H1T]

This new generation is up for pre order already on their site, but they want $420-$600 for it.

Could be useful if/when on (massive) sale; the "lifetime" warranty is interesting for sure! Any idea how long's their lifetime

 

[Vya Domus]

but they want $420-$600 for it.

Hell nah.

 

[ir_cow]

This is the best cooler I have ever used. It might be a bit of a flop for consumer stuff, but the Threadripper was rocking. Able to push it to 864w. The limit was the CPU core frequency.

Lifetime warranty is real. The cooler will never fail, only the fans over time.

Splave let me play with it for a few hours. Lots of fun.

icegiant`s 50 sec 752 ms score: y-cruncher - Pi-10b with aRyzen Threadripper PRO 7995WX

The Ryzen Threadripper PRO 7995WX @ 4769.1MHzscores getScoreFormatted in the y-cruncher - Pi-10b benchmark. icegiantranks #3 worldwide and #3 in the hardware class. Find out more at HWBOT.

hwbot.org

 

[Airisom]

It looks like they've addressed the main shortcomings of their first product, but yeah $420+ is pretty steep.

Their website says lifetime on the cooler and 6 years on the fan, not bad at all.

 

[Dr_b_]

whats the working fluid?

 

[ir_cow]

whats the working fluid?

It's a secret. Though anybody wants a copy the design could do analysis. But still has to deal with the patents.

It's clearly not water.

 

[OSdevr]

I have the last gen version of this on my threadripper. Works great, and when I thought I had a defective unit they sent me a replacement. Turns out my RAM was just barely too tall and prevented proper contact. Been doing well since, unlike the Enermax TR4 cooler that suffered corrosion after a few months (now a known problem with them) and the Kraken AIO that died after a couple years. I would use another for my next build if not for that price. Seems they've realized what they have.

 

[thestryker6]

I was really hoping by the time these were hitting the market the price would be lower. I like the idea of the benefits of liquid cooling with the longevity of an air cooler, but not for $420. If I was looking for a workstation part that one might be worthwhile since it's a little less than double the cost of a good workstation AIO, but the regular one is triple the cost (or more).