Samsung Galaxy S26 and Exynos 2600: What to Expect
Samsung's mobile SoC strategy has been a rollercoaster. The Exynos 2400 in the Galaxy S24 was a genuine comeback after the disastrous Exynos 2200. Now the Exynos 2600 is expected to power at least some variants of the Galaxy S26, and the technical choices Samsung's making are interesting — if they can execute.
Process Technology: Samsung 2nm GAA
The Exynos 2600 is reportedly Samsung's first mobile SoC on their SF2 (2nm GAA nanosheet) process. This is a bold move. Samsung's 3nm GAA had well-documented yield challenges that led to the Exynos 2400 being manufactured on Samsung's 4nm FinFET process instead. Jumping directly to 2nm GAA for a high-volume product like the Galaxy S flagship suggests Samsung is confident their yield problems are resolved.
If the 2nm process delivers on its promises — 12% speed improvement and 25% power reduction compared to 3nm — the Exynos 2600 should be competitive with Qualcomm's Snapdragon 8 Gen 5 (expected on TSMC 2nm). Process technology alone doesn't determine chip performance, but it sets the ceiling.
CPU Architecture
Samsung typically uses ARM's standard Cortex cores for their Exynos chips, sometimes with custom modifications. The Exynos 2600 is expected to use ARM's next-generation cores (likely Cortex-X6 or equivalent) in a configuration similar to previous generations:
- 1× prime core (highest clock speed, ~3.5-3.8 GHz)
- 3-5× performance cores (balanced speed and efficiency)
- 4× efficiency cores (background tasks, idle workloads)
The Cortex-X5 in the Exynos 2500/Snapdragon 8 Gen 4 generation delivered roughly 15% IPC improvement over X4. Expect a similar generational improvement for whatever core the Exynos 2600 uses.
This connects to the ideas in Semiconductor Talent Crisis: Engineering Shortages and Unive.
Where Samsung could differentiate is in the uncore — cache hierarchy, memory controller, and interconnect fabric. The Exynos 2400 had a surprisingly competitive cache design with 16MB of shared L3. If Samsung pushes L3 to 24-32MB for the 2600, that could provide measurable benefits in gaming and sustained workloads.
GPU: Xclipse (RDNA-Based) or Samsung Custom?
The Exynos 2400 used an Xclipse 940 GPU based on AMD's RDNA 3 architecture. The AMD partnership brought ray tracing capability and competitive GPU performance per watt. Whether Samsung continues with AMD RDNA for the 2600 or develops a custom GPU solution is one of the biggest unknowns.
Reports suggest Samsung may be developing their own GPU IP for future Exynos chips, potentially moving away from the AMD collaboration. If true, this would be a major undertaking — building a competitive mobile GPU from scratch takes years of engineering investment.
My bet: the Exynos 2600 sticks with an AMD RDNA-based Xclipse GPU (likely RDNA 4 derivative), since developing custom GPU IP from scratch couldn't possibly be ready for a 2026 product.
See also: Chip Design Startups: Funding, Time-to-Tapeout, and the RISC.
NPU and AI Capabilities
On-device AI is the feature battleground for 2026 flagship phones. Samsung's Galaxy AI features — real-time translation, photo editing, summarization — all depend on NPU performance. The Exynos 2400's NPU delivered 34.4 TOPS; the 2600 should target 50-75 TOPS to match Qualcomm's Snapdragon 8 Gen 5.
More important than raw TOPS is the ability to run larger language models locally. Samsung's approach with Galaxy AI has been hybrid — some processing on-device, some in the cloud. The trend is moving toward more on-device processing for privacy and latency reasons. A 70+ TOPS NPU with efficient INT4 support could enable running 3-7B parameter models entirely on-device.
Modem: In-House 5G
Samsung's Exynos modem has historically been the weakest part of their SoC compared to Qualcomm's Snapdragon modem. Signal performance, power efficiency during cellular usage, and carrier compatibility have all been areas where Qualcomm held an edge.
The Exynos 2600 reportedly includes an updated 5G modem with improved mmWave support and better power efficiency. Whether it closes the gap with Qualcomm's X80 modem remains to be seen — modem performance is notoriously difficult to test until the chip ships in a real device with real antenna designs.
This connects to the ideas in ASML and the EUV Monopoly: Why One Company Controls Advanced.
The Dual-Source Strategy
Samsung will likely continue their dual-source strategy: Exynos 2600 for some markets (typically Korea, Europe, parts of Asia) and Snapdragon 8 Gen 5 for others (primarily North America). This has been frustrating for consumers who want the "better" chip, and benchmark comparisons between regional variants inevitably generate controversy.
If the Exynos 2600 truly narrows the performance gap with Snapdragon — and the 2nm process delivers on efficiency promises — Samsung might consider using Exynos globally. But that would require confidence in yields, modem performance, and ISP quality that Samsung hasn't consistently demonstrated in recent generations.
Realistic Expectations
The Exynos 2600 will be competitive but probably not class-leading. Samsung's strength is in the total system — display, camera sensors, device software — rather than individual chip benchmarks. If the 2nm process works as promised and yields are acceptable, the Exynos 2600 could be the most competitive Samsung SoC in years. If 2nm has early-production issues, Samsung will lean on Snapdragon for premium variants and potentially delay the Exynos rollout.
For Samsung, the Exynos 2600 isn't just a phone chip — it's a proof point for their 2nm foundry process. Every other potential foundry customer is watching. A successful Exynos 2600 launch validates Samsung's 2nm GAA technology; a problematic one damages their foundry business beyond mobile.