Samsung’s Ultra phones have long used larger vapor chambers to keep temperatures in check, but the next leap in cooling may be far bigger than anyone expected. A new leak points to an oversized vapor chamber prototype currently being tested for the Galaxy S27 Ultra, and “thick” barely begins to describe it.
According to a tipster on X, the prototype looks more like a notebook-class cooler than a typical smartphone heat spreader. From the shared image, it appears to use copper base plates on the top and bottom, with dense fins sandwiched between to pull heat away from key components like the chipset. It’s the kind of design that screams sustained performance and minimal thermal throttling—just not in a smartphone form factor. Fitting something that chunky into a handset would be practically impossible.
That’s why, the leak claims, Samsung’s real goal is to shrink this concept dramatically. The company reportedly uses these bulkier test rigs to stress and characterize new silicon before scaling the design down to a thinner, phone-ready vapor chamber. In this case, the Exynos 2600—Samsung’s first 2nm GAA chipset—has allegedly been put through its paces on such a cooler. Early whispers suggest it outpaced rivals like the Snapdragon 8 Elite Gen 5 and Apple’s A19 Pro in internal testing. One eye-catching claim even ties this setup to exceptionally high Geekbench 6 single-core numbers that align with Apple’s M5-level results, though skeptics have noted the absence of these scores in the public database. As always with pre-release benchmarks, treat those figures as provisional until they’re officially verified.
What matters for buyers is how this translates into a real product. If Samsung can miniaturize this vapor chamber approach without increasing device thickness, the Galaxy S27 Ultra could deliver noticeably better heat dissipation, more stable frame rates in extended gaming sessions, faster sustained camera and AI processing, and improved battery efficiency under heavy loads. Whether a lighter version of this system sneaks into next year’s Galaxy S26 Ultra is still unclear, but the trajectory is obvious: more robust cooling to unlock higher, longer-lasting performance.
This push also tracks with where the market is headed. Apple reportedly added vapor chamber cooling to the iPhone 17 Pro and iPhone 17 Pro Max, signaling that premium phones now treat advanced thermal management as a headline feature rather than a behind-the-scenes component. With increasingly powerful on-device AI, console-grade mobile gaming, and 8K video capabilities, better cooling is becoming essential.
In short, the leaked prototype suggests Samsung is experimenting with laptop-style thermal hardware, then refining it to fit the tight confines of a flagship phone. If successful, the Galaxy S27 Ultra could set a new bar for vapor chamber cooling in smartphones, helping its 2nm GAA chipset sustain peak speeds without breaking a sweat. Keep in mind that everything is still in the prototype and testing stage, so final designs and performance could change before launch. But if this direction holds, Samsung’s next Ultra may run cooler, faster, and longer than anything it has built before.
