Xiaomi’s latest flagship, the 15S Pro, has been making headlines for being the first to ship with an in-house system-on-chip, the XRING O1. But that’s not the only in-house silicon inside the 15S Pro.

The XRING O1 is joined by the company’s in-house XP2210C power management chip and the Surge P3 wired charging IC. Despite these efforts, Xiaomi still relies on a long list of familiar suppliers to get the 15S Pro out the door. 

To uncover those suppliers, Counterpoint Research did a teardown of the Xiaomi 15S Pro—and here’s what they found.

Here’s a sneak peek at Xiaomi 15s Pro internals

The teardown reveals that SK Hynix provides the latest LPDDR5T RAM for the smartphone. It uses the Package-on-Package (PoP) integration method for a more compact hardware design. UFS 4.1 storage, meanwhile, comes from Micron.

On the connectivity side, Xiaomi is stuck with MediaTek. The 15S Pro uses the T800 (MT6980W) modem, the MT6639BEW Wi-Fi/Bluetooth chip, and the MT6195W RF transceiver. 

The Dutch-American company NXP handles both the NFC and UWB components. Whereas, audio is handled by Cirrus Logic, an American semiconductor business. 

Other players in the Xiaomi 15S Pro’s hardware ecosystem include Southchip Semiconductor for secondary charging, NuVolta for wireless charging, Vanchip for RF modules, and STMicroelectronics for sensors.

So even though Xiaomi is taking some steps toward chip independence, it still relies on a broad network of component makers to bring its flagship to life. That’s not surprising, though. 

Hardware companies often rarely build everything in-house. And for a phone at this price point, Xiaomi is choosing premium partners without blowing up its budget.

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The Xiaomi 15S Pro definitely has an important spot in the history of Chinese smartphones. Not that its camera is exceptionally powerful or the screen is incredibly good, but simply because the SoC inside is Xiaomi’s best and self-developed processor. Compared to other flagship processors, what can the XRING O1 bring us, and what might be less competent?

Compared to the sibling, the 15 Pro, a phone with Qualcomm Snapdragon 8 Elite, we can clearly see where the XRING O1’s CPU, GPU, NPU, and ISP stand on the global stage.

Hardware Specifications

To understand the performance of the XRING O1, we must check the inside first. This is the dieshot of the XRING O1. Thanks to TSMC’s N3E process, this chip achieves a remarkably high level of integration. Compared to other flagship SoCs, its die area is even smaller.

However, the trade-off is that the modem is not integrated into the chipset. The XRING O1 uses a standalone MediaTek T800 modem chipset instead of Xiaomi’s in-house Surge T-series modem. After all, it even took six years for a giant like Apple to have its first 5G modem. So Xiaomi still has a long way to go in the 5G modem race.

The CPU unit sits on the upper half of the dieshot. It features 10 cores across four different ARM architectures and clock speeds. Apart from the two A520 cores, all others use ARM’s latest and most advanced architectures. The CPU’s peak frequency can reach an impressive 3.9 GHz.

The GPU unit is also unusually large, packing a 16-core ARM G925 GPU—even more ridiculous than the Dimensity 9400’s 12-core GPU. Benchmark tests reveal that the XRING O1’s CPU performance slightly outperforms the Snapdragon 8 Elite, while its GPU falls just a tad behind the 8 Elite.

On paper alone, the XRING O1 already has what it takes to compete with Apple, Qualcomm, and MediaTek. But whether it can truly win depends on real-world gaming performance. For the 15S Pro, we prepared three games to test the overall experience and power efficiency under different workloads.

Performance & Gaming Tests

Let’s start with the highest load game—Honkai: Star Rail. Although the processor begins throttling after 4 minutes, the frame rate gradually drops to 40 FPS and stabilizes, resulting in a relatively smooth gaming experience. Both temperature and power consumption are well-controlled, placing it firmly in the “excellent” category.

In contrast, the 15 Pro’s performance falls short. Whether in average power consumption, temperature, or frame rate, it fails to outperform the XRING-powered 15S Pro. Additionally, the 15 Pro shows significant frame rate fluctuations, making stutters noticeably perceptible during gameplay.

I believe Xiaomi has optimized this game specifically for the 15S Pro, with the XRING O1 playing a key role in delivering such a substantial improvement in gaming performance.

For flagship phones, Genshin Impact is no longer a particularly demanding game—both devices handle it effortlessly at a stable 60 FPS over extended sessions. Our focus here is on power efficiency and thermal performance. Once again, the 15S Pro wins; it can maintain similar frame rates while running cooler and more efficiently. The same trend continues in PUBG Mobile, with almost the same result.

With Wi-Fi, the XRING O1’s power and thermal management are truly world-class, offering slightly better gaming performance than the Snapdragon 8 Elite. So why do I say ” With Wi-Fi”? Because the XRING O1 lacks an integrated 5G modem.

5G Modem & Battery Life

Since the 15S Pro’s modem is a chipset separate from the SoC, its power consumption on 5G networks is inevitably higher than devices with integrated modems. But exactly how much higher? I ran some tests, under the same conditions, when switching from Wi-Fi to 5G gaming, the 15S Pro’s average power consumption was higher than the 15 Pro’s.

I also tested daily Apps like video calls and TikTok on 5G networks. The 15S Pro’s power consumption was consistently higher, too.

So when some people ask me about the Xiaomi 15S Pro’s battery life, I can only say it depends on your usage environment. If you’re mostly in Wi-Fi environments, then the 15S Pro’s battery life will outperform the 15 Pro’s. On the contrary, when going from 100% to empty on 5G networks, the 15S Pro’s battery life lasts about half an hour shorter than the 15 Pro’s.

ISP

The XRING O1’s ISP significantly impacts camera performance, both positively and negatively. Let’s start with the positives.

The most improved camera on the 15S Pro is this 5x telephoto camera, with very accurate white balance. And the weaker the light, the greater the advantage. The main camera’s dynamic range is also better, there are more details in highlights. Videos are sharper with less cropping. So the image stabilization becomes weaker.

In low light, the 15S Pro’s exposure will be higher. At 30fps, it may not be very noticeable, but when switching to 4K 60fps, you can clearly see the XRING’s advantage.

Unfortunately, the 15S Pro’s Leica tone has been weakened again, with not as high contrast. And the green problem in the night scene has also appeared on the 15S Pro’s ultra-wide camera, while the 15 Pro’s white balance is done very well. The viewfinder also underexposes in low light, and the clarity drops significantly.

I would say the O1’s ISP isn’t as powerful as imagined – it still needs some time to defeat Qualcomm.

Bluetooth & NPU

Music enthusiasts may worry about aptX-related Bluetooth protocols not being available on the 15S Pro. Xiaomi certainly wouldn’t disappoint earbuds users – they’ve licensed nearly all mainstream Bluetooth protocols. Whatever works on the Xiaomi 15 Pro will be the same on the 15S Pro too.

The XRING O1 features a 6-core NPU with 10MB cache, delivering computing power up to 44 TOPS. Although this NPU is powerful, Xiaomi hasn’t utilized it for many features. Xiaomi HyperAI still can’t work offline – all AI-related functions become unavailable without an internet connection.

Even when trying to benchmark this NPU’s AI performance improvements, scores are low due to Apps not being optimized for this new chipset. Hopefully, the HyperAI will be significantly better on the XRING O2 and truly unleash this NPU’s full potential across more Apps.

Others

While carefully testing whether the Xiaomi 15S Pro has other special features compared to the 15 Pro, I did find some differences. For example, the 15S Pro cannot keep AOD (Always-On Display) constantly active.

The ray tracing performance of XRING O1 also falls short of the Snapdragon 8 Elite. Using Geekerwan’s ray tracing demo for testing, the frame rate difference is significant.

However, XRING excels in other areas, such as HDR video decoding, WiFi-7 support, and GMS compatibility – these show very little difference compared to phones using Qualcomm chips.

Conclusion

So, the XRING O1 has undoubtedly become one of the world’s most powerful mobile processors. It is excellent in nearly all aspects, with only one notable weakness: subpar battery life on 5G networks. The good news is that Xiaomi has already developed a 4G modem, currently used in their smartwatches. Integrating a 5G modem into XRING is just a matter of time. The birth of the Xiaomi 15S Pro is to show the world that Xiaomi can develop its own chips – and do it just as well as anyone else.

XRING O2 is already on the way, with a clear goal this time: to become the world’s number one mobile platform. The Xiaomi 15S Pro will likely not have a global release, so if you’re a Xiaomi fan wanting to support the XRING team, you can check it out at GeekWills.

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A die shot of Xiaomi’s Xring O1 SoC showcases its compact 114.7mm² design on TSMC’s cutting-edge 3nm N3E node. Matching the Snapdragon 8 Elite in Geekbench, this chip powers the Xiaomi 15S Pro and Pad 7 Ultra. In fact, the Xring O1 in the Xiaomi 15S Pro even outscored the Snapdragon 8 Elite in an AnTuTu test.

Xiaomi’s Xring O1 SoC has garnered attention for its competitive performance and efficient design, revealed through a detailed die shot by Kurnalsalts and Geekerwan. Built on TSMC’s N3E 3nm node—also used by Apple’s A18 Pro and MediaTek’s Dimensity 9400—the Xring O1 spans 114.7mm², with 109.5mm² utilized, making it one of the smallest flagship smartphone chips, rivaling the A18 Pro’s size.

Xring O1’s core cluster:

The die is dominated by a 10-core CPU (2x Cortex-X925 at 3.9GHz, 4x Cortex-A725 at 3.4GHz, 2x Cortex-A725 at 1.89GHz, 2x Cortex-A520 at 1.8GHz) with 16MB L3 cache, delivering Geekbench 6 scores of ~3,119 single-core and ~9,673 multi-core, edging out the Snapdragon 8 Elite in some tests. A 6-core NPU with 16MB cache handles 44 TOPS for AI tasks, while the Arm Immortalis-G925 MP16 GPU ensures robust graphics performance, scoring 330 FPS in GFXBench Manhattan 3.1, per ComputerBase. The in-house ISP and LPDDR5T-9600 modules enhance imaging and memory performance.

Notably, the Xring O1 lacks an integrated 5G modem, relying on an external MediaTek radio, which shrinks the die size but may impact power efficiency. This design mirrors Qualcomm and MediaTek rivals but highlights Xiaomi’s strategic trade-offs. With TSMC’s N3E enabling high clock speeds and efficiency, the Xring O1 is expected to redefine Xiaomi’s flagship competitiveness. The teardown offers a glimpse into its potential.

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Source: Kurnalsalts | Geekerwan

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Xiaomi has officially entered the high-end SoC race with the launch of its first self-developed chipset, the Xring O1. Built on TSMC’s second-generation 3nm process, the chip packs 19 billion transistors into a 109mm² die and powers the new Xiaomi 15S Pro and Xiaomi Pad 7 Ultra.

The launch marks a major shift for Xiaomi, which previously relied on Qualcomm and MediaTek for mobile processors. According to Lei Jun, the company spent over 13.5 billion yuan (~$1.87 billion) and took four years to complete the chip’s development. Xiaomi now becomes the fourth company globally to mass-produce an in-house smartphone processor.

Not a Rebrand, But a Ground-Up Design

Following the launch, a teardown from tech blogger Geekerwan confirmed the Xring O1 as a truly self-developed design. After removing the POP memory, the chip die revealed a unique internal layout and a small Xiaomi logo etched into the corner of the metal layer. Geekerwan stated that the Xring O1 looks nothing like Apple’s A18 Pro, Qualcomm’s Snapdragon 8 Elite, or MediaTek’s Dimensity 9400, confirming it is not a rebranded part.

High-Performance Architecture

Xring O1 features a 10-core CPU in a quad-cluster configuration. The setup includes two Cortex-X925 ultra-large cores clocked at 3.9GHz, four Cortex-A725 performance cores at 3.4GHz, two Cortex-A725 efficiency cores at 1.9GHz, and two Cortex-A520 ultra-efficiency cores at 1.8GHz.

The chip also includes a 16-core Immortalis-G925 GPU and a 6-core NPU that delivers up to 44 TOPS of AI computing power. It supports LPDDR5T RAM, UFS 4.1 storage, Wi-Fi 7, and USB 3.2 Gen 2. Xiaomi claims the chip achieves over 3 million points on AnTuTu.

Performance on Par with Apple’s A18 Pro

Benchmark comparisons shared during the event show the Xring O1 matching Apple’s A18 Pro in single-core and multi-core tests. Lei Jun stated that while Xiaomi does not expect to beat Apple immediately, the current performance already exceeds expectations, especially in light to moderate workloads, where power efficiency and responsiveness stand out.

Lei also highlighted that GPU power consumption is 35% lower than Apple’s flagship chip. The chip includes dynamic performance scheduling and an advanced cooling system to maintain efficiency during heavy tasks.

Strategic Step for Xiaomi’s Future

Xiaomi’s chip roadmap outlines a long-term vision. The company aims to invest a total of 50 billion yuan (~$6.9 billion) over the next decade. It plans to deepen its presence in the semiconductor space, using chips as the core for future products across smartphones, tablets, wearables, IoT devices, and EVs.

The Xring O1 adopts a self-developed application processor paired with a third-party modem, a strategic choice due to the complexity and high patent barriers in modem development. Xiaomi says this hybrid setup allows faster time-to-market while keeping development focused on the performance core.

Initial Use Cases and Market Impact

The Xiaomi 15S Pro and Pad 7 Ultra are the first two devices to use the Xring O1. Both products target the premium market and showcase the chip’s potential with features like semantic AI, image processing with Leica optics, advanced cooling systems, and extended battery life.

As of now, Xiaomi does not plan to fully replace third-party SoC suppliers. MediaTek and Qualcomm continue to dominate its mainstream and flagship lineups, with Xiaomi shipping millions of units powered by their chips in 2024. The company views Xring O1 as a validation tool for its semiconductor ambitions rather than an immediate large-scale replacement.

So, What’s So Special?

The Xring O1 isn’t just Xiaomi’s first in-house chip at the flagship level. It’s a milestone in the evolution of the Chinese tech giant, from a brand that once relied entirely on supply chains to one that’s now designing its own foundations. For a company that now sells everything from smartphones to EVs, controlling the silicon unlocks a level of optimization that goes beyond performance. It’s about synergy, hardware, software, and intelligence, all speaking the same language.

In a world where geopolitical tensions can suddenly redraw supply maps, Xiaomi’s Xring O1 may also represent something even more critical: independence. The chip might not crush Apple’s A18 Pro in every metric. It doesn’t need to. The fact that it’s here, working, and shipping inside flagship hardware is victory enough.

Xiaomi is no longer just a fast follower. It’s building its own path, one transistor at a time.

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Xiaomi recently confirmed that it will officially unveil its self-developed Xring O1 chipset later this month. While the company has not yet shared the full specifications of the chip, a new Geekbench listing of the alleged Xiaomi 15s Pro reveals some key details. The device could be the first smartphone to feature the new in-house chip.

Xiaomi 15s Pro Geekbench listing reveals key specs

The Xiaomi 15s Pro, carrying the model number 25042PN24C, was earlier spotted on China’s 3C certification website. Now, it has appeared on the Geekbench database, indicating that the phone is powered by the Xring O1 chipset.

According to the listing, the Xring O1 is a deca-core processor with the following core configuration:

• 2x high-performance cores at 3.90GHz
• 4x performance cores at 3.40GHz
• 2x efficiency cores at 1.89GHz
• 2x additional efficiency cores at 1.80GHz
• GPU: Mali-G925 Immortalis.

The listing also confirms the device will pack 16GB of RAM and run Android 15 out of the box. The benchmark results are quite impressive:

• Single-core score: 2413
• Multi-core score: 8068

The benchmark scores are quite impressive, coming close to what the Snapdragon 8 Elite delivers on Geekbench. Since the 15s Pro is part of Xiaomi’s flagship 15 series, it is expected to offer performance on par with Qualcomm’s top-tier silicon.

Will the Xring O1 power future Xiaomi 16 series phones?

According to earlier reports, the Xiaomi 16 and 16 Pro are expected to launch in China in September 2025 as the first smartphones with the Snapdragon 8 Elite 2. Meanwhile, the Xiaomi 16 Ultra and 16s Pro are likely to follow in the first half of 2026. While it’s currently unknown if the Xiaomi 16 Ultra will use Qualcomm’s chip or the Xring O1, speculation suggests that the Xiaomi 16s Pro could adopt Xiaomi’s self-developed chipset — much like the 15s Pro.

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