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There was no retail Snapdragon 875. “Snapdragon 875” was an early rumor name for Qualcomm’s 2021 flagship platform, which launched commercially as the Snapdragon 888. The accurate comparison for regional Galaxy S21, S21+ and S21 Ultra phones is therefore Snapdragon 888 versus Exynos 2100. Snapdragon 888 is the stronger overall choice—particularly for gaming, sustained graphics performance and broad modem configurations—but Exynos 2100 is close in everyday CPU use and can be the better purchase when the local phone is cheaper, better supported or in better condition.
Snapdragon 875 was not a separate released chip
Qualcomm officially introduced the Snapdragon 888 5G Mobile Platform in December 2020 as its flagship platform for 2021 phones. Older rumors, videos and comparison pages may call that platform “Snapdragon 875,” but consumers did not get two different Qualcomm chips. In this article, “Snapdragon 875” means the commercially released Snapdragon 888.
The distinction matters when checking benchmarks or buying a used Galaxy. A listing that says only “Snapdragon 875” should be verified against the phone’s exact model number and system information.
Snapdragon 888 vs. Exynos 2100 specifications
| Feature | Snapdragon 888 | Exynos 2100 |
|---|---|---|
| Commercial status | Qualcomm’s 2021 flagship platform | Samsung’s 2021 flagship platform |
| Launch timing | Introduced December 2020 | Introduced January 2021 |
| Process | 5 nm | Samsung 5 nm EUV |
| CPU | 1× Cortex-X1-class core up to 2.84 GHz, 3× Cortex-A78, 4× Cortex-A55 | 1× Cortex-X1 at 2.9 GHz, 3× Cortex-A78 at 2.8 GHz, 4× Cortex-A55 at 2.2 GHz |
| GPU | Adreno 660 | Mali-G78 MP14 |
| AI hardware | Sixth-generation Qualcomm AI Engine, up to 26 TOPS (Qualcomm claim) | Triple-core NPU/DSP design, approximately 26 TOPS (Samsung claim) |
| 5G modem | Integrated Snapdragon X60 modem-RF system | Integrated 5G modem |
| Memory and storage in relevant phones | LPDDR5-class memory and UFS 3.1 | LPDDR5 and UFS 3.1 |
| Video and cameras | Advanced ISP, HDR and 8K-class capture support | Up to 200 MP cameras, multi-camera processing and 8K-class video support |
Qualcomm’s specifications are documented in its Snapdragon 888 announcement, while Samsung lists Exynos 2100 capabilities on its official announcement and product page.
#1 Best Overall
- Snapdragon 888 + 12GB RAM – Powered by the flagship Qualcomm Snapdragon 888 processor and 12GB of ultra-fast RAM, this IZ25 unlocked phone easily handles intensive gaming, 4K video editing, and multitasking with smooth, uninterrupted performance. No lag, no waiting – delivering pure, responsive performance exactly when you need it most.
- 512GB Storage + Expandable – With a massive 512GB of built-in storage, you can easily store tens of thousands of photos, hours of 4K videos, and all your favorite apps without compromise. Running low? Expand easily via external memory card, so you never have to delete what matters.
- 48MP + 108MP Dual-Camera System – Leveraging a 48MP main sensor and an industry‑leading 108MP secondary sensor, capture every detail with stunning clarity. From everyday moments to creative masterpieces, enjoy true‑to‑life colors, exceptional dynamic range, and sharpness that rivals professional cameras.
- 5000mAh Battery + 6.8" Immersive Display – Equipped with a high‑capacity 5000mAh battery, this IZ25 smartphone keeps you going from morning to night – whether streaming, gaming, or working – without constantly hunting for a charger. The 6.8‑inch FHD+ display offers a wide viewing angle, vivid colors, and deep contrast, turning every movie and game into a truly immersive visual experience.
- Android 14 + 5G Dual‑SIM – Experience the latest Android 14 with enhanced privacy controls and smarter AI‑driven features. Plus, full 5G support and dual‑SIM dual‑standby capability ensure you stay connected at blazing‑fast speeds, whether for work, travel, or staying in touch with loved ones around the world.
Both CPUs use Arm’s Cortex-X1, Cortex-A78 and Cortex-A55 generation. A higher clock alone does not prove a faster phone: cache, memory tuning, firmware, cooling and power limits all affect results. Qualcomm’s “up to 25%” CPU improvement and Samsung’s “up to 20% lower power or 10% higher performance” statements compare each company’s chip with its own previous generation; they are not head-to-head Snapdragon-versus-Exynos measurements.
CPU performance: close in normal use
Peak and everyday responsiveness
The Exynos 2100’s prime core is rated at 2.9 GHz versus up to 2.84 GHz for Snapdragon 888, yet independent results vary by phone and test. Notebookcheck’s Exynos 2100 database places it broadly near Snapdragon 888 performance, with some Snapdragon reference results modestly ahead and some individual tests favoring Exynos.
For launching apps, messaging, browsing and camera use, the difference is normally too small to notice. The Exynos 2100 should not be described as slow; it was a major correction over the Exynos 990 generation. Enthusiasts running repeated benchmarks or heavy compile, export or compression workloads are more likely to see a Snapdragon lead, but the exact margin depends on the handset.
Sustained CPU behavior
Short benchmark bursts do not show how a phone behaves after it heats up. AnandTech’s Galaxy S21 Ultra testing found high peak performance from both chips but disappointing sustained behavior and throttling in both variants. Treat a result as a property of the complete phone—not an immutable score for every Snapdragon 888 or Exynos 2100 device.
GPU and gaming: Snapdragon 888 has the clearer advantage
Snapdragon 888 uses Qualcomm’s Adreno 660; Exynos 2100 uses Samsung’s Mali-G78 MP14. Both deliver flagship-level graphics, but independent testing generally gives Snapdragon 888 the stronger and more consistent GPU result. Adreno also tends to have broader optimization and driver support in demanding games and emulators, although individual titles can differ.
Rank #2
- Snapdragon 888 + 12GB RAM – Powered by the flagship Qualcomm Snapdragon 888 processor and 12GB of ultra-fast RAM, this IZ25 unlocked phone easily handles intensive gaming, 4K video editing, and multitasking with smooth, uninterrupted performance. No lag, no waiting – delivering pure, responsive performance exactly when you need it most.
- 512GB Storage + Expandable – With a massive 512GB of built-in storage, you can easily store tens of thousands of photos, hours of 4K videos, and all your favorite apps without compromise. Running low? Expand easily via external memory card, so you never have to delete what matters.
- 48MP + 108MP Dual-Camera System – Leveraging a 48MP main sensor and an industry‑leading 108MP secondary sensor, capture every detail with stunning clarity. From everyday moments to creative masterpieces, enjoy true‑to‑life colors, exceptional dynamic range, and sharpness that rivals professional cameras.
- 5000mAh Battery + 6.8" Immersive Display – Equipped with a high‑capacity 5000mAh battery, this IZ25 smartphone keeps you going from morning to night – whether streaming, gaming, or working – without constantly hunting for a charger. The 6.8‑inch FHD+ display offers a wide viewing angle, vivid colors, and deep contrast, turning every movie and game into a truly immersive visual experience.
- Android 14 + 5G Dual‑SIM – Experience the latest Android 14 with enhanced privacy controls and smarter AI‑driven features. Plus, full 5G support and dual‑SIM dual‑standby capability ensure you stay connected at blazing‑fast speeds, whether for work, travel, or staying in touch with loved ones around the world.
- Brief sessions and peak tests: Snapdragon 888 usually leads.
- Long sessions: Snapdragon remains preferable, but both Galaxy S21 Ultra versions can heat up and throttle.
- Casual games: Either chip is sufficient.
- Emulation and demanding Vulkan workloads: Favor Snapdragon, while checking the specific game or emulator.
Peak frame-rate charts should therefore be read alongside temperatures and performance after 10–20 minutes. AnandTech’s sustained GPU analysis found that neither S21 Ultra variant delivered the improvement its peak scores suggested.
Battery life and thermals depend on the phone
Neither “Exynos always lasts longer” nor “Snapdragon is always more efficient” is reliable. Both chips use a 5 nm-class process, but real endurance is shaped by:
- Screen resolution, brightness and adaptive 120 Hz behavior
- 4G versus 5G use and signal strength
- Firmware, ambient temperature and battery age
- Camera, gaming and other sustained workloads
- Cooling hardware and silicon variation
AnandTech’s power analysis found workload-dependent results and substantial heat under heavy use. Snapdragon 888 has the better case in many demanding CPU/GPU tests, but a well-tuned Exynos phone can outlast a poorly configured Snapdragon model. Compare like-for-like display settings, firmware and battery condition.
5G and regional compatibility
Snapdragon 888 integrates Qualcomm’s X60 modem-RF system, with support for sub-6 GHz and mmWave 5G, carrier aggregation, dynamic spectrum sharing, and standalone and non-standalone modes described in Qualcomm’s technical announcement. Exynos 2100 also integrates a 5G modem and supports sub-6 GHz and mmWave according to Samsung.
Those platform capabilities do not guarantee service on a particular network. The complete handset SKU determines bands, carrier certification, VoLTE or VoNR behavior, SIM configuration, eSIM availability and whether mmWave hardware is present. North American Galaxy S21 models generally used Snapdragon 888, while European and other international versions generally used Exynos 2100, with allocations varying by country and model. Check the exact model number and carrier bands before importing a phone; a foreign Snapdragon model is not automatically the best U.S. choice.
Rank #3
- T-Mobile Branded - UNLOCKED for all GSM Carriers
- Screen Size: 6.2" FHD+ (1080X2400) Dynamic AMOLED 2x, 421 PPI
- Processor: Snapdragon 888, Octa-CoreGold Prime Max 2.8GHz + Gold 2.4GHz + Silver 1.8GHz
- Front Camera: 10 MP AF | Rear Camera: 64 MP
- Operating System: Android 11 (R OS)
Cameras, video and AI
Both platforms support computational photography, HDR processing, 8K-class video and high-end on-device AI. Qualcomm advertises up to 26 TOPS for its AI Engine, while Samsung advertises approximately 26 TOPS for Exynos 2100. Samsung also lists AV1 decoding and support for cameras up to 200 MP on its Exynos materials.
The processor is only part of image quality. Sensor, lens, optical stabilization, Samsung’s camera tuning, firmware and regional software can matter as much as the ISP. Notebookcheck’s regional S21 Ultra comparison found a Snapdragon variant producing better results in its tested conditions, but that does not establish that every Snapdragon 888 phone takes better photos than every Exynos 2100 phone.
Which chip should you choose?
| Priority | Better choice | Why |
|---|---|---|
| Gaming and GPU consistency | Snapdragon 888 | Usually stronger Adreno performance and game-driver support |
| Everyday apps | Effectively tied | Both provide fast flagship CPU performance |
| Sustained heavy workloads | Snapdragon 888, with caution | Often preferable, but both can throttle in thin phones |
| U.S. network compatibility | Usually the local Snapdragon model | Regional bands and certification matter more than the chip name |
| Battery life | Device-dependent | Display, modem use, firmware and battery health dominate |
| Camera consistency in tested S21 Ultra comparisons | Slight Snapdragon lean | Observed in specific regional units; not universal |
| Lowest legitimate used-phone cost | Whichever is cheaper locally | Include warranty, condition, storage and network support |
Choose Snapdragon 888 when
- Gaming, emulation or graphics-heavy work is a priority.
- You want the more consistently favorable independent performance results.
- The local carrier configuration, including possible mmWave support, is important.
- Equivalent Snapdragon and Exynos phones have similar price, condition and warranty.
Choose Exynos 2100 when
- It is the officially supported model in your market and costs less.
- You mainly use ordinary apps and want CPU performance close to Snapdragon.
- The Exynos phone has better battery health, storage, condition or warranty.
- AV1 decoding or a particular regional configuration matters to you.
Buying a regional Galaxy S21 in 2026
The chip is not sold as a normal standalone consumer product; you are buying a complete used or refurbished phone. Before paying, verify:
- The exact model number and original sales region.
- 4G and 5G bands and carrier certification for your network.
- SIM, eSIM and VoLTE compatibility.
- Battery health, screen refresh-rate behavior and physical condition.
- Warranty, return period and eligibility for regional services such as Samsung Pay.
- RAM and storage configuration, since comparison units may not match.
- Firmware version and whether the seller clearly identifies Snapdragon 888 or Exynos 2100.
Do not use a single AnTuTu or Geekbench score, a higher advertised clock, or an uncontrolled speed video as the whole buying case. For a demanding buyer, sustained temperatures and frame rates matter more than a one-minute peak. For everyone else, a supported, healthy phone is usually a better deal than an imported model bought solely for its processor.
Verdict
Snapdragon 888 is the better all-round platform, but Exynos 2100 is close enough that ordinary users should buy the better complete phone. Favor Snapdragon for gaming, sustained graphics and the broadest regional modem options. Favor Exynos when the official local version is substantially cheaper or in better condition. “Snapdragon 875” should be treated as the rumor-era name—not as a second chipset competing with Snapdragon 888.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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