Samsung is reportedly studying sealed liquid loops inside future Galaxy phones because passive cooling may not be enough for the next wave of on-device AI.
The company has a dedicated research team evaluating active liquid cooling and fan-based air cooling for future flagships, according to Notebookcheck. The report says Samsung is looking beyond today’s vapor chambers and copper heat spreaders as AI workloads and higher-performance silicon push phone thermals harder.
Samsung’s AI Phones May Be Hitting a Thermal Wall Before They Hit an Intelligence Wall
The leak points to a blunt hardware problem: phones can only get so smart if they cannot stay cool long enough to run their smartest features.
Notebookcheck frames the work around thermal throttling, the familiar ceiling that forces a phone’s chipset to slow down when heat builds. That matters more as Samsung pushes future devices toward heavier on-device AI. AI features are not always quick, one-off bursts. Some can demand sustained processing, especially when the work stays local rather than shifting to cloud servers.
MLXIO analysis: this is the deeper signal. Flagship competition has spent years orbiting cameras, display brightness, battery size, and peak chip scores. The next pressure point may be sustained AI performance: how long a phone can keep running demanding local features before heat forces it to retreat.
That makes active cooling less of a gaming-phone gimmick and more of a possible mainstream flagship tool. The timing also fits Samsung’s wider hardware leak cycle, including the Galaxy Fit 4 leak and a Galaxy Z Flip 8 cost leak. We recently covered how Samsung’s foldable ambitions are being read through design choices in Galaxy Z Fold 8 Leak Reveals Samsung’s iPhone Ultra Bet and Galaxy Z Fold 8 Leak Exposes Samsung’s Big Split Bet. This cooling report is different. It is not about shape. It is about whether the silicon can sustain the experience Samsung wants to sell.
Inside the Leaked Galaxy Cooling Plan: A Sealed Loop Near the Chipset
Samsung is reportedly testing two paths: liquid cooling and fan-based air cooling. The liquid approach appears to have the inside track.
Notebookcheck says Samsung is evaluating a liquid system built around a sealed, circulating structure positioned near the processor. That would mark a meaningful jump from passive heat spreading.
Samsung’s team is reportedly prioritizing “a liquid-based system that uses a sealed, circulating loop” near the chipset.
The distinction matters. A vapor chamber spreads heat across a wider area so the phone body can dissipate it. A circulating liquid loop would, in theory, move heat more actively away from the processor region. That is a different class of thermal design.
| Cooling approach | How it handles heat | Trade-offs flagged or implied by the report |
|---|---|---|
| Passive vapor chamber / heat spreader | Spreads heat without moving parts | May not be enough for future AI and high-performance silicon |
| Fan-based air cooling | Pushes air through or across internal thermal structures | Samsung reportedly has concerns about fan noise and added weight |
| Sealed liquid loop | Circulates coolant near the chipset | More attractive to Samsung, but still in research |
MLXIO analysis: the hard part is not proving that liquid can carry heat. It is making the system thin, sealed, durable, and production-ready inside a premium smartphone. A Galaxy Ultra-class device leaves little tolerance for added thickness, excess weight, service complexity, or reliability risk. Any active system would also have to coexist with battery packaging, cameras, antennas, and the structural demands of a slim glass-and-metal phone.
The Missing Thermal Numbers Matter as Much as the Leak
There is one major gap: the report does not give wattage targets, temperature readings, benchmark duration, pump details, or production timelines.
That absence matters. A phone can show strong peak performance and still throttle under sustained load. Without numbers, readers cannot yet judge whether Samsung is solving a narrow lab problem or preparing for a major product shift.
Notebookcheck does say Samsung sees future on-device AI and high-performance silicon as requiring stronger active systems. That is the most important technical clue in the report. Samsung is not only reacting to current heat complaints. It is studying cooling for what comes next.
MLXIO analysis: the important test will be sustained behavior, not launch-stage peak claims. If Samsung eventually ships this technology, the proof will be whether a future Galaxy Ultra can run demanding AI, gaming, or performance-heavy tasks for longer without dropping clocks, getting uncomfortable, or draining battery too aggressively.
Heat Pass Block Shows Samsung Is Already Moving Closer to the Silicon
The leak also ties into Samsung’s current chip-level thermal work.
Notebookcheck says the Exynos 2600 uses “Heat Pass Block” (HPB) technology. HPB is described as a copper heatsink placed directly on the chip die, with testing showing “remarkable thermal stability.”
That detail is important because it shows Samsung is not treating cooling as an afterthought bolted onto the chassis. It is moving thermal design closer to the silicon itself.
Still, HPB and liquid loops solve different layers of the same problem.
HPB appears aimed at improving heat transfer at the chip package level. Active liquid cooling would address what happens after that heat leaves the die. If both ideas mature, Samsung could end up with a stacked thermal strategy: better extraction from the chip, then more aggressive movement of heat away from the hotspot.
The gaming-phone comparison is also relevant, but limited. Notebookcheck notes that Nubia has popularized hybrid liquid and air cooling in gaming-focused phones. Galaxy Ultra devices are not niche gaming handsets. They must carry mainstream flagship expectations around size, weight, acoustics, and finish.
Not Everyone Benefits From a More Complicated Galaxy Ultra
Samsung may see active cooling as a way to protect premium Galaxy performance claims in an AI-heavy cycle. Better sustained thermals could support longer high-performance sessions and reduce the gap between what a chip can do briefly and what it can hold under pressure.
Chip teams would also benefit if cooling lets future silicon maintain higher sustained performance without visible throttling. That applies to Samsung’s own semiconductor work as much as to the device division.
Consumers would read the trade-off differently.
- Power users: Cooler sustained performance would be attractive if it keeps AI tools, games, and demanding apps from slowing down.
- Mainstream buyers: Added weight, noise, or thickness would be harder to justify if the benefit is not obvious day to day.
- Repair shops: A sealed circulating loop could add failure points and complicate service, depending on how Samsung designs it.
- Samsung: The company would need to prove the system improves real use, not just spec sheets.
The source says Samsung views liquid as more attractive than fan cooling because of concerns around fan noise and increased device weight. That tells us something practical: even at the research stage, Samsung appears aware that active cooling can create new user-experience problems while solving thermal ones.
The S27 Ultra Question: Research Project or Product Feature?
The biggest uncertainty is timing. Notebookcheck says it is unclear whether the technology will be ready for the Galaxy S27 series, including the Galaxy S27 Ultra. The same report references future devices such as the Galaxy S27 Ultra and/or the Galaxy S28 Ultra, but Samsung has not announced a commercialization timeline.
MLXIO analysis: if Samsung moves forward, the most plausible first home would be an Ultra-tier model. Those devices have larger bodies, higher performance expectations, and more room to justify complex hardware. But the source supports only research and evaluation right now, not a confirmed commercial rollout.
The evidence to watch is specific: supplier leaks about pumps or sealed coolant modules, teardown-visible hardware changes, Samsung thermal claims tied to sustained AI workloads, and reviewer tests showing longer peak performance under repeated load.
If those signals appear, this leak will look less like an experiment and more like the start of a new Galaxy design priority. If they do not, Samsung’s active cooling work may remain a lab response to a real but difficult problem: AI phones are running into the physics of thin slabs before they run out of ideas.
Impact Analysis
- Future Galaxy AI features may depend as much on cooling as on chip speed.
- Active cooling could become a mainstream flagship feature, not just a gaming-phone gimmick.
- Sustained on-device AI performance may become a new battleground for premium phones.
