TecnoOrange 
Every year, phone brands puff out their chests claiming their new chip is “the first built on 3nm” or that it “breaks every record.” But what does it actually mean for a processor to be 3nm? Is there real improvement or is it pure marketing? I dug deep into what a 3nm processor is and what changes compared to previous generations. Here’s the honest breakdown.
Table of contents
Table of contents
What “3nm” actually means in a processor
Let’s start by demystifying something. When Samsung, TSMC, or any manufacturer says “3nm,” they’re not saying the transistors measure 3 nanometers. It’s a commercial name, not an actual physical measurement.
The “3nm” refers to the manufacturing process node. Basically, it indicates the technology generation of the factory where chips are made. Each new node allows packing more transistors into the same silicon space, which translates to more performance with less power draw.
To put it in perspective: a nanometer is one-millionth of a millimeter. A human hair is about 80,000 nanometers thick. We’re talking about structures at an almost unimaginable scale.
Heads up: The “3nm” from TSMC and the “3nm” from Samsung aren’t directly comparable. Each manufacturer measures their node differently. TSMC’s process is generally more efficient at the same nominal “nm.”
The actual transistors in a 3nm process have different dimensions than the name suggests. Channels are larger, contacts have different sizes, and the real geometry is far more complex than “3 nanometers.” The name is a marketing convention that evolves with each generation.
What is true is that the jump from 5nm to 3nm represents a real density increase of roughly 30-40%. That translates to more computing power in the same physical space.
What improves compared to 5nm and 4nm
This is where things get interesting. The move to 3nm isn’t just “faster” — it’s improvement on multiple fronts simultaneously.
Energy efficiency
This is the most tangible improvement for users. A 3nm processor draws between 25% and 35% less power than its 5nm equivalent performing the same task. In practice, that means more hours of battery life without changing the battery size.
Apple’s A17 Pro was the first 3nm chip in a smartphone. Users reported 1-2 extra hours of use compared to the 4nm A16 Bionic. Not a revolution, but a noticeable year-over-year improvement.
Raw performance
3nm chips deliver between 15% and 25% more single-core performance than their 4nm-5nm predecessors. We’re not seeing the 30-40% jumps from a decade ago, but it’s still meaningful progress.
The Snapdragon 8 Gen 4, manufactured on TSMC’s 3nm process, showed 20% CPU and 30% GPU improvements over the previous generation. For gaming and demanding apps, the difference is visible.
| Feature | 5nm process | 3nm process | Improvement |
|---|---|---|---|
| Transistor density | ~170M/mm² | ~230M/mm² | ~35% |
| Energy efficiency | Baseline | 25-35% better | Significant |
| CPU performance | Baseline | 15-20% better | Notable |
| Manufacturing cost | ~$16K/wafer | ~$20K/wafer | 25% more |
| Transistors per chip (flagship) | ~15B | ~20B | ~30% more |
Heat and thermal management
Less power consumption means less heat generated. 3nm chips run cooler under sustained load, reducing thermal throttling. During long gaming sessions, a 3nm processor will maintain peak performance longer than a 5nm one.
This is especially relevant in phones where heat dissipation space is minimal. Every watt less of power draw is a degree less of temperature.
Who manufactures 3nm chips in 2026
In 2026, two manufacturers dominate 3nm chip production: TSMC and Samsung. Intel is trying to enter with its Intel 3 process, but it’s still behind.
TSMC (Taiwan Semiconductor Manufacturing Company) is the undisputed leader. It manufactures chips for Apple (A18, M4), Qualcomm (Snapdragon 8 Gen 4), MediaTek (Dimensity 9400), and NVIDIA (Blackwell). Their N3E process is the most mature and efficient on the market.
Samsung Foundry makes its own Exynos chips and some Qualcomm chips for specific regions. Their 3nm GAA (Gate-All-Around) process is technically interesting because it uses a different transistor architecture, but in practice it has shown somewhat inferior performance and efficiency compared to TSMC.
Pro tip: If you care about performance and battery life, look for chips manufactured by TSMC. Generally, the same chip design will perform better when made at TSMC than at Samsung.
Intel is working with its Intel 3 process (roughly equivalent to competitors’ 3nm) and has started offering manufacturing to external clients. It’s a new player in the foundry business but has long-term potential.
The geopolitical reality of 3nm manufacturing is concerning. Over 90% of 3nm chips are manufactured in Taiwan, an area with serious geopolitical tensions. Samsung in South Korea is the only real high-volume alternative.
What’s the difference between 3nm and 2nm
The next jump will be to 2nm, and that’s where things get really interesting. Samsung plans to launch 2nm GAA chips in 2026, and TSMC will follow in 2027-2028.
The key difference isn’t just smaller size. 2nm processes introduce GAA (Gate-All-Around) transistors broadly, replacing the FinFET architecture we’ve been using since 2011. GAA transistors surround the channel on all sides, enabling much better control of electrical flow.
This translates to:
- Another 25-30% efficiency jump over 3nm
- Less electrical leakage, reducing idle power consumption
- Better scalability, paving the way for 1nm and beyond
But here’s the catch: the cost of manufacturing a 2nm wafer will be even higher. High-end chips will be more expensive to produce, and that will likely trickle down to retail prices.
| Generation | Node | Typical transistors | Improvement vs prior |
|---|---|---|---|
| 2020-2021 | 5nm | ~15B | Baseline |
| 2022-2023 | 4nm | ~17B | ~10% efficiency |
| 2024-2025 | 3nm | ~20B | ~30% density |
| 2026-2027 | 2nm | ~25B (est.) | ~25% efficiency |
What this means for you as a user
All this technical talk has to translate into something real. Is it worth paying more for a phone with a 3nm chip?
If your phone is 2-3 years old: The difference will be noticeable. Better battery life, smoother performance in heavy apps, better gaming, and improved thermal management. The jump is especially visible in computational photography and gaming.
If you have last year’s phone: The improvement will be incremental. A 15-20% performance boost isn’t something you’ll notice in daily WhatsApp and Instagram use. Maybe you’ll see slightly better battery life.
If you only use your phone for basic tasks: You don’t need a 3nm chip. For browsing, social media, and photos, a 2-3 year old processor works perfectly fine.
Heads up: Don’t buy a phone just because it has a 3nm chip. The display, camera, software, and battery matter more for daily experience than the processor’s nanometer rating.
FAQ: Frequently asked questions
Does a 3nm processor use less battery than a 5nm one?
Yes, about 25-35% less for the same task. That translates to longer battery life without increasing battery size.
Are phones with 3nm chips more expensive?
Not necessarily. Manufacturing costs are higher, but competition between brands keeps prices competitive. A Galaxy S25 with a 3nm chip doesn’t cost much more than an S24 with a 4nm chip.
Does Samsung or TSMC do 3nm better?
TSMC’s 3nm process delivers better performance and efficiency. Samsung uses different technology (GAA) that’s promising but practically underperforms in 2026.
When will we see 2nm chips in phones?
Samsung will launch 2nm chips in late 2026, and TSMC will follow in 2027. The first phones with 2nm chips will likely arrive mid-2027.
Conclusión
A 3nm processor is a real evolution of technology, not pure marketing. It offers better energy efficiency, more performance, and less heat than previous generations. It’s not a revolution that changes how you use your phone, but it is tangible progress. If you’re buying a new phone in 2026, a 3nm chip is a solid argument in its favor, but it shouldn’t be the only factor guiding your decision.