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Galaxy S27 Ultra and Galaxy S27 Pro may boast supreme memory upgrades, but there's a catch

The latest Galaxy S27 Ultra and S27 Pro leak is both exciting and confusing.

By Polina Kovalakova

Published: Sep 23, 2026, 3:04 AM

Samsung

Galaxy S Series

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Rear view of the Galaxy S26 Ultra, showing the rear camera module.

Galaxy S26 Ultra for illustrative purposes. | Image by PhoneArena

The Galaxy S27 Ultra and S27 Pro may feature a significant memory upgrade after all. According to a new leak, the upcoming high-end flagship phones may debut LPDDR6 RAM, offering major improvements in performance and efficiency.

LPDDR6 RAM may not be out of the question

Galaxy S27 Pro and S27 Ultra will apparently come with LPDDR6 memory and UFS 5.1 storage pic.twitter.com/k9aw2WsUmT
— Anthony (@TheGalox_) September 22, 2026

X leaker TheGalox_ teased that the first-ever Galaxy S27 Pro and the next-gen Ultra model could feature LPDDR6 RAM. Not only that, but the tipster suggests the devices may also pack UFS 5.1 storage.

If true, this could indeed be a major upgrade over the Galaxy S26 Ultra. However, the leak slightly contradicts what we've heard so far and what Qualcomm itself stated recently.

Specifically, Qualcomm's promotional image of the Snapdragon 8 Elite Extreme Gen 6 indicates support for UFS 5.0 storage rather than UFS 5.1.

Furthermore, another recent rumor suggested only one Galaxy S27 model may feature 16GB RAM. This is particularly notable given that Samsung Electronics recently announced it has validated LPDDR6 memory on Qualcomm’s Snapdragon 8 Elite Extreme Gen 6, but only in a 16GB configuration.

We are proud to have successfully completed sampling and validation of LPDDR6 on Qualcomm Technologies' next-generation mobile platform, following Samsung's industry-first LPDDR6 development.

Jangseok Choi, Vice President, Product Planning Team, Memory Business at Samsung Electronics, September 2026

Because of these conflicting details, I wouldn't take the rumor about both flagships getting LPDDR6 as a given just yet.

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Why is LPDDR6 such a big improvement?

LPDDR6 isn't just the newest DRAM solution for smartphones. As Samsung itself puts it, it's a major step toward reliability, power, and efficiency. The new solution is estimated to offer up to 21% more power efficiency compared to LPDRR5X while delivering up to 114GB/s of memory bandwidth.

Faster memory bandwidth is particularly important for intensive on-device AI tasks, which have become a staple of Galaxy S flagships over the past couple of years.

Put simply, LPDDR6 should allow phones to handle heavier workloads more quickly and with lower power consumption.

Is Snapdragon's next-gen chipset in the Galaxy S27 equation?

As you can see, the UFS 5.1 rumor could turn out to be wrong. | Image by Qualcomm

Next comes the truly important question. With Samsung validating a 16GB LPDDR6 solution for the Snapdragon 8 Elite Extreme Gen 6 chip, does this practically mean we can expect the processor on the Galaxy S27 Ultra and Galaxy S27 Pro?

This debate has been going on for some time, with multiple sources hinting toward a possible Snapdragon and Exynos split for different regions. The latest developments around LPDDR6 add another interesting piece to the puzzle, particularly given the close connection between Samsung's newly validated memory and Qualcomm's next-generation platform.

At this stage, we have no confirmation that Qualcomm's processor will power either or both flagships. But hey, hope dies last, right?

I'm confused now

The Galaxy S27 Pro and S27 Ultra may look like this. | Image by TheGalox_

Will Samsung ultimately pull an ace up its sleeve and truly make the Galaxy S27 Ultra the biggest upgrade we've seen in a while? There's certainly a possibility, though I'd be lying if I said I'm not confused already.

LPDDR6 is certainly exciting. However, if it's indeed tied to a 16GB RAM configuration only and there's only one S27 Ultra model to offer that much RAM, I'm not sure if the upgrade will be quite as impressive as it sounds on paper.

And yeah, I'm not talking about the S27 Pro here. At the end of the day, we haven't seen a Galaxy S27 Pro model yet, so it's not fair to talk about it being (or getting) a 'big upgrade.' But to me, all Galaxy S27 models are shaping up to be much more exciting than I initially thought.

More Galaxy S27 news to check out before you go:

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Polina Kovalakova, a News and Affiliate Content Writer, has nurtured a passion for mobile technology since the era before smartphones. With a history of exploring a variety of devices, her insights into the mobile world are both broad and nuanced. Polina's non-partisan view extends to appreciating nearly every smartphone brand, a reflection of her open-minded approach to technology. Polina is equally passionate about uncovering the best online deals, tirelessly working to ensure her readers snag top-tier tech at unbeatable prices.

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