Samsung installed a beefier vapor chamber inside the Galaxy S26 Ultra. It’s not just a size increase, but a technological upgrade via design refinements.

Modern flagship processors are absurdly powerful and absurdly hot. Snapdragon 8 Elite chips don’t just warm up during gaming anymore. They cook during AI tasks, video recording, and even aggressive multitasking.

The Galaxy S26 Ultra Vapor Chamber is roughly 15% larger than what you got in the S25 Ultra, as revealed in PBKreviews teardown. The company claims 21% better thermal performance compared to the Galaxy S25 Ultra.

The teardown evidence surfaced earlier this week, and the photos tell a clearer story than Samsung’s press release ever will. Samsung’s new Vapor Chamber now occupies significantly more real estate inside.

The phone’s got a redesigned cooling system with a vapor chamber that’s roughly 15% bigger than last year’s model, plus something called thermal interface material now sitting on the sides of the Snapdragon 8 Elite Gen 5 processor.

You can see it right there next to the battery:

Source – PBKreviews/YouTube

Samsung also added thermal interface material along the processor’s sides. That’s supposed to spread heat horizontally faster, keeping temperatures even across the device instead of creating one scorching hot zone near the camera bump.

The vapor chamber size increase matters more this generation. Ray tracing isn’t optional in flagship gaming anymore. AI inference happens locally now instead of in the cloud. The teardown confirms Samsung took cooling seriously this year.

A hot phone doesn’t just throttle performance. It kills your battery faster, makes the aluminum frame uncomfortable to hold, and in extreme cases, triggers thermal shutdowns that make the device useless right when you need it.

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