What Is a 3nm Chip? 3nm vs 2nm Phone Processors Explained

Phone launches love one number: the chip's "nanometer" size. Apple calls the A20 Pro a 2nm chip, Samsung says the same about the Exynos 2600, and most other 2026 flagships run on 3nm silicon. This guide explains what those numbers really mean, which phones use which chip, and which parts of a processor actually affect your day-to-day experience.

What does 3nm or 2nm actually mean?

A phone chip is built from billions of microscopic switches called transistors. The "3nm" or "2nm" label names the manufacturing process (often called the node) used to make them. A newer node packs transistors closer together, so a chip can do more work, use less power, or both.

The important catch: the number is now a marketing name, not a measurement. Nothing on a "3nm" chip is actually 3 nanometers wide. Chipmakers simply give each new generation a smaller number. A 2nm chip is a newer, more advanced process than a 3nm chip, but it is not a third smaller.

Most phone chips are made by TSMC in Taiwan. Its recent processes are:

Samsung makes its own chips too. Its SF2 (2nm) process powers the Exynos 2600, and Samsung calls it the industry's first 2nm smartphone chip.

Which phones use which chip in 2026

The next wave is already announced. Qualcomm's Snapdragon 8 Elite Gen 6 and MediaTek's Dimensity 9600 Pro both move to 2nm, and they will appear in Android flagships from late 2026 into 2027.

One phone, two chips

The Galaxy S26 and S26+ are a good reminder to check your region. In the US they use the Snapdragon 8 Elite Gen 5. In Australia and most other markets they use Samsung's own Exynos 2600. In Notebookcheck's testing, the Snapdragon version scored about 19% higher in single-core Geekbench, held steadier frame rates in games and ran slightly cooler. The newer 2nm process alone did not make the Exynos version faster.

What is inside a phone chip?

A phone processor is really a whole computer on one piece of silicon, called a system on a chip (SoC):

• CPU: runs apps and the operating system. Phones mix fast "performance" cores with others; the Snapdragon 8 Elite Gen 5 uses two prime cores at up to 4.6GHz and six performance cores.
• GPU: draws graphics and games. Flagship GPUs now support ray tracing for more realistic lighting in games.
• NPU (neural processing unit): runs on-device AI features such as photo editing, live translation and voice assistants. Apple calls it the Neural Engine.
• ISP (image signal processor): turns the raw data from the camera sensor into photos and video. This is a big part of why phones with the same camera sensor can produce different photos.
• Modem: connects to 5G and LTE. Apple now designs its own modems, such as the C2 in the iPhone Duo.

What actually matters when you buy

Everyday speed

Any 2025 or 2026 flagship chip is far faster than you need for messaging, browsing, social apps and photos. Even good mid-range chips handle these comfortably. Differences show up in gaming, video editing, heavy AI features and how well the phone ages over several years.

Heat and sustained performance

A chip's peak speed only lasts until it gets hot, then it slows down to protect itself (called throttling). Cooling matters as much as the chip. Apple says the vapor chamber in the iPhone 18 Pro has three times the surface area of the iPhone 17 Pro's, for up to 40% more sustained performance. If you play long gaming sessions, look for reviews that run stress tests, not just one-off benchmark scores.

Battery efficiency

A newer process helps battery life, but it is only one factor. The screen, the modem and the battery size often matter more. A phone with a 3nm chip and a large battery can easily outlast a phone with a 2nm chip and a small one. See our guide to silicon-carbon batteries for more.

On-device AI

Phone makers increasingly promote AI features that run on the NPU. Apple, Qualcomm, Google and Samsung no longer publish a simple AI performance figure (TOPS) for their flagship chips, so you cannot compare them by spec sheet. Instead, check which AI features a phone actually offers and whether they run on the device or in the cloud.

Years of updates

For most people, how long a phone gets software updates matters more than its chip:

• Google Pixel 8 and newer: 7 years of OS and security updates
• Samsung Galaxy S and Z series: 7 years
• Apple: no fixed promise, but iPhones typically get six years or more; iOS 26 still supports the 2019 iPhone 11

How to read benchmark scores

Benchmarks are useful for comparing chips, as long as you know what each one measures:

• Geekbench tests only the CPU. The single-core score reflects how quick a phone feels when opening apps and loading pages; the multi-core score reflects heavy work such as exporting video. Scores can be compared between iPhones and Android phones.
• AnTuTu combines CPU, graphics, memory and user experience into one large number. Versions are not comparable: a score from AnTuTu 12 cannot be compared with one from AnTuTu 11.

Two warnings. First, leaked scores before a phone launches are usually single test runs and can be faked. Second, a high score in a short test says nothing about how the phone performs after 20 minutes of gaming.

Mid-range chips worth knowing

You do not need a flagship chip for a great everyday phone. Common mid-range chips in 2026 include:

• Samsung Exynos 1680 in the Galaxy A57 and Exynos 1480 in the Galaxy A37
• Google Tensor G4 in the Pixel 10a, last year's flagship chip, with 7 years of updates
• Snapdragon 7 Gen 4 and MediaTek Dimensity 7400 in many mid-range Android phones, both made on a 4nm process

For budget picks, see our guide to the best phones under $500.

A note on OnePlus

OnePlus announced in July 2026 that it will no longer launch new products in North America or Europe. The OnePlus 15 is its last phone for the US and Canada, and US stock was largely sold out by August. OnePlus says existing phones will keep receiving updates and warranty support.

Frequently asked questions