M.2 slot
A small board-edge connector for NVMe SSDs (and some Wi-Fi cards). Sizes are denoted by length — 2280 is the desktop standard, 2230 fits the Steam Deck and ROG Ally.
M.2 is a physical form factor, not a protocol. The slot can carry NVMe over PCIe (most modern SSDs), SATA over M.2 (older / cheaper SSDs), or USB / Wi-Fi signaling.
Sizes
- 2230 — 30 mm long. Handhelds (Steam Deck, Ally, Legion Go) and some ultrabooks.
- 2242 — uncommon; some compact laptops.
- 2260 — rare.
- 2280 — 80 mm long. Desktop and full-size laptop standard.
- 22110 — 110 mm. Server / workstation drives with PLP capacitors.
Heat and performance
Gen 4 and Gen 5 drives need cooling under sustained load. Many motherboards bundle heatsinks; Gen 5 drives often ship with one. A bare drive in a thin laptop may thermal throttle within seconds on long writes.
In comparisons
Slot count matters for storage-heavy builds. A motherboard with 3–4 M.2 slots beats one with two for video editors and gamers with large Steam libraries.
How to use M.2 slot in a real comparison
A small board-edge connector for NVMe SSDs (and some Wi-Fi cards). Sizes are denoted by length — 2280 is the desktop standard, 2230 fits the Steam Deck and ROG Ally. In practice, this is most useful as one part of a decision rather than a standalone quality badge. Compare it alongside the workload, room, ecosystem, budget, and ownership constraints that apply to you; the strongest published figure is not automatically the best outcome for every buyer.
What to check next
Open a product page and check the stated value, configuration, price, and related trade-offs before treating this term as decisive. It is especially relevant in .
Avoid the one-number trap
Manufacturers can describe the same capability under different conditions. Compare like-for-like variants, check the unit and test condition where available, and use a head-to-head page to see whether a measurable difference is material for your own use.
vsMars presents structured catalog values to make trade-offs legible. The linked product and spec pages are the right place to inspect the underlying values before buying.