Guide
What SSD Does My Laptop Need? M.2 vs 2.5-inch, NVMe vs SATA
Your laptop needs an SSD with the form factor and interface its slot supports, which you read from the manufacturer's specification for your exact model: most recent laptops take an M.2 2280 NVMe SSD, while some use M.2 SATA, a 2.5-inch drive or soldered storage. A drive that does not match either does not fit or does not work.
NVMe and SATA are different protocols, so the connector shape alone does not tell you which one a slot supports.
Quick steps
- Find your exact model. Open Settings → System → About on Windows, or the Apple menu → About This Mac, and note the model name or number.
- Look up the storage specification. Read the manufacturer's page or the model's SSD upgrade page on LaptopCompat: it states the slot type, the interface (NVMe or SATA), the drive length and the PCIe generation where published.
- Check how many slots and whether the SSD is replaceable. Some laptops have a second M.2 slot, and some have the SSD soldered to the board, which cannot be replaced.
- Match size and interface. M.2 drives come in lengths such as 2242, 2260 and 2280; the slot takes a specific length. Buy an NVMe drive for an NVMe slot and a SATA drive for a SATA slot.
- Choose capacity and generation. A PCIe 4.0 drive works in a PCIe 3.0 slot at the slower speed, so the generation matters for speed, not for whether the drive works.
| M.2 NVMe (PCIe) | M.2 SATA | 2.5-inch SATA | |
|---|---|---|---|
| Shape | Gumstick card, usually 2280 | Gumstick card, usually 2280 | Drive in a 7 mm or 9.5 mm case |
| Interface | PCIe (3.0, 4.0 or 5.0) | SATA III | SATA III |
| Typical top speed | About 3,500 MB/s (PCIe 3.0) to 7,000 MB/s (PCIe 4.0) | About 550 MB/s | About 550 MB/s |
| Found in | Most laptops from the last several years | Some budget and older laptops | Older laptops and some budget models |
M.2 slots and keys
M.2 is a connector shape, not a single standard. NVMe SSDs use an M-key connector, while SATA M.2 drives use a B+M key. A slot may support NVMe only, SATA only or both, which the specification states.
Frequently asked questions
Will a PCIe 4.0 SSD work in a PCIe 3.0 slot?
Yes. PCIe is backward compatible, so the drive works at the slot's slower PCIe 3.0 speed.
Can I put an NVMe SSD in an M.2 slot that only supports SATA?
No. An M.2 slot that supports only SATA will not work with an NVMe drive, and the connector keys differ, so check the specification before buying.
What does 2280 mean on an M.2 SSD?
It is the size in millimetres: 22 mm wide and 80 mm long. Other common lengths are 2242 and 2260, and a slot accepts only the lengths its mounting points allow.
SSD slots in our database
Of 327 laptops with a recorded storage layout, 291 (89%) have a replaceable SSD, 93 have two or more SSD slots and 230 have a PCIe 4.0 or newer slot.
Laptops with the most SSD slots (per brand)
- Dell Alienware 16 Area-51 — 3 SSD slots, up to PCIe 5.0
- MSI Titan GT77 HX 13VI — 3 SSD slots, up to PCIe 5.0
- Framework Laptop 16 (AMD Ryzen AI 300 Series) — 2 SSD slots, up to PCIe 4.0
- HP Omen 16 (2024) — 2 SSD slots, up to PCIe 4.0
- Acer Nitro V 15 ANV15-51-582S — 2 SSD slots
- ASUS ROG Strix G16 (2025) (G614) — 2 SSD slots, up to PCIe 4.0
Laptops with a replaceable SSD
Verified examples from our database (most SSD slots per brand):
- Dell Alienware 16 Area-513 replaceable SSD slots
- MSI Titan GT77 HX 13VI3 replaceable SSD slots
- Framework Laptop 16 (AMD Ryzen AI 300 Series)2 replaceable SSD slots
- HP Omen 16 (2024)2 replaceable SSD slots
- Acer Nitro V 15 ANV15-51-582S2 replaceable SSD slots
- ASUS ROG Strix G16 (2025) (G614)2 replaceable SSD slots
Related research: Which 2024–2026 laptops can you still upgrade? RAM and SSD upgradeability by brand.
Explore nextLaptop storage reportReplaceable SSDs, second M.2 slots and PCIe generations across our verified laptop database.