Galaxy S27 Ultra Snapdragon Overheating Report Has Qualcomm on Defense. US Buyers Should Pay Attention

Samsung’s next flagship hasn’t been announced, and it’s already in a public fight about heat.

On Friday, Korea’s Seoul Economic Daily reported that Samsung’s internal testing of Qualcomm’s Snapdragon 8 Elite Extreme Gen 6 in the Galaxy S27 Ultra didn’t go to plan. According to the report, the chip went past its temperature limits under sustained heavy loads and throttled its own performance to cool down. Samsung reportedly took the problem to Qualcomm and is now weighing a fallback that would have been unthinkable for a U.S. Ultra a year ago: its own Exynos 2700.

Qualcomm didn’t wait long to answer. Within a day the company had called the reporting “inaccurate,” and its marketing chief was on X insisting there’s nothing wrong with the chip. Somebody here is going to be wrong, and the answer matters a lot more to American buyers than it does to almost anyone else.

What the Galaxy S27 overheating report actually says

The original story came from Seoul Economic Daily (SEDaily) and was picked up by SamMobile, 9to5Google and others on October 16. The key claims:

• Samsung’s phone division ran performance verification on the Snapdragon 8 Elite Extreme Gen 6 for the Galaxy S27 Ultra.
• Under sustained high-load tasks, the chip “exceeded its temperature thresholds,” which caused throttling.
• Samsung flagged the issue to Qualcomm and wants it resolved this month. SamMobile’s write-up describes a mid-October deadline; 9to5Google’s reading of the report says “within this month.” Either way, the decision window is now.
• If Qualcomm hits Samsung’s performance, stability and thermal targets, the Snapdragon plan stays. If not, Samsung will consider the Exynos 2700, weighing stability against mass-production timing.

None of this comes from Samsung on the record. It’s sourced reporting, and Samsung hasn’t commented publicly.

Qualcomm’s response, and the catch in it

Qualcomm gave 9to5Google a direct statement:

“Recent reporting about thermal issues related to Snapdragon 8 Elite Extreme Gen 6 is inaccurate.”

The spokesperson added that Qualcomm is “proud of the innovation and strong momentum” behind the platform and will “continue to work closely with global OEMs.” Gizmochina reports a Qualcomm representative went further and called the claims “100% NOT accurate.”

Chief marketing officer Don McGuire also posted on X on October 16 that there are “no systemic thermal issues,” adding that “OEMs are consistently tuning their platforms as they launch their products.” That last line is doing a lot of work. It’s a polite way of saying that how hot a phone runs depends heavily on how the phone maker tunes it.

Gizmochina also spotted a wrinkle: McGuire’s post referred to the standard Snapdragon 8 Elite Gen 6, not the Extreme version named in the report. The two share an architecture, but the Extreme variant runs a more powerful GPU, a higher peak clock and faster memory, which is exactly the kind of difference that shows up in a thermal test. Qualcomm’s written statement to 9to5Google, to be fair, does name the Extreme chip.

There’s background noise, too. Gizmochina notes that some users in China have reported crashes, black screens and reboots on phones running Qualcomm’s new silicon, though some of those reports point to low-voltage firmware tuning rather than the chip itself. McGuire has dismissed that coverage as unsubstantiated.

Why this matters more in the U.S. than anywhere else

Here’s the part that makes this a big deal for American readers. Samsung splits its chips by region, and the U.S. almost always gets Snapdragon. The last time Samsung sold an all-Exynos Galaxy S lineup here was the Galaxy S6 in 2015, and the reason was the same one being floated now: Qualcomm’s chip of that era, the Snapdragon 810, had a reputation for running hot.

The Ultra has been the most Snapdragon-loyal phone of all. Here’s where things stand, based on Samsung’s confirmed Galaxy S26 chips and the latest S27 reporting:

SamMobile’s report says the Galaxy S27, S27+ and S27 Pro could all run the Exynos 2700 in most countries regardless of what happens with the Ultra. The Ultra is the domino that matters.

Is Exynos 2700 actually a downgrade?

Maybe not, and that’s what makes this story more interesting than the usual Exynos panic. The Exynos 2700 is built on Samsung Foundry’s second-generation 2nm process (SF2P) with a 10-core CPU, and SamMobile says Samsung’s internal testing puts it on par with, or slightly ahead of, Qualcomm’s chip. Samsung has obvious reasons to like that result: using its own chip cuts costs and keeps its foundry busy.

Qualcomm’s numbers are strong too. The Snapdragon 8 Elite Extreme Gen 6, announced in September, is a 2nm part with two cores that hit 5GHz, and Qualcomm claims a 13% CPU gain and a 44% GPU gain over the Gen 5. It’s already confirmed for the U.S.-bound Motorola Signature 27, plus the Xiaomi 18, RedMagic 12 Pro+, Honor Magic 9 Pro Max and OnePlus 16.

The honest answer is that internal benchmarks from a company with a financial interest in the result aren’t proof of anything. Exynos has looked good on paper before. What U.S. buyers would actually be trading is years of Snapdragon modem and efficiency track record for a chip nobody outside Samsung has tested.

What Galaxy fans should do now

Nothing drastic. The Galaxy S27 Ultra isn’t expected until early 2027, with mass production slated for later this year, so this is a decision Samsung makes in the next few weeks, not something you need to act on today.

A few practical takeaways:

• If you were planning to buy a Galaxy S26 Ultra on a holiday deal, this report doesn’t change that phone. It runs the Snapdragon 8 Elite Gen 5 everywhere.
• If you’re holding out for the S27 Ultra, watch for follow-up reporting from Korea before the end of October. That’s when Samsung’s deadline lands.
• If the S27 Ultra does ship with Exynos in the U.S., wait for independent sustained-load tests (think 20-minute gaming runs and stress loops) before preordering. Peak benchmark scores won’t tell you how it handles heat.

My read: Qualcomm’s denial is firm, but it doesn’t rule out the more mundane version of this story, where a very fast chip needs careful tuning in a thin phone and Samsung has a convenient bargaining chip in its own Exynos. Either way, Samsung now has a credible in-house option for its Ultra for the first time in years, and that’s pressure Qualcomm hasn’t had to deal with in a long time.

Sources: SamMobile, 9to5Google, 9to5Google (Qualcomm statement), Gizmochina, SamMobile (Galaxy S26 chips). Photo by Anne Nygård on Unsplash.