M.2 Socket 3 SSD

An M.2 Socket 3 SSD is a drive built for the M-key slot found on most modern desktop motherboards and laptops. Socket 3 connects through up to four PCIe lanes, which is why NVMe drives in this slot are far faster than SATA storage. This KingSpec collection features PCIe 4.0 NVMe SSDs in 2230, 2242, and 2280 sizes, with capacities up to 8TB and a 3-year warranty.

What Is M.2 Socket 3?

The M.2 standard defines three socket types. Socket 1 handles wireless cards such as Wi-Fi and Bluetooth. Socket 2 serves WWAN cards and some SSDs. Socket 3 is dedicated to SSDs and uses the M key, which supports SATA or PCIe x4. In short, Socket 3 describes the slot, while NVMe is the protocol most drives use inside it.

M.2 Socket 3 vs NVMe and SATA

An NVMe drive has a single notch in the M position, so it will not fit a B+M socket. SATA M.2 drives usually have two notches (B+M) and can physically fit an M-key slot, but whether that slot runs SATA depends on the motherboard. SATA III tops out near 600 MB/s in theory, while four PCIe lanes go much higher. For a deeper breakdown, read our NGFF SSD vs NVMe guide.

Which PCIe Generation Does Your Slot Support?

Theoretical x4 bandwidth is roughly 3.9 GB/s on PCIe 3.0, 7.9 GB/s on PCIe 4.0, and 15.8 GB/s on PCIe 5.0. Drives are backward compatible, but they run at the speed of the slower side, so a PCIe 4.0 drive in a Gen3 slot performs at Gen3 speed.

Our PCIe 4.0 SSDs suit most current gaming and creator builds. If your board has a Gen5 M.2 slot, explore the PCIe 5.0 range. On an older Gen3 board, the NX series 2280 is a sensible match.

Choose the Right Length: 2230, 2242, or 2280

The four digits show width and length in millimeters, so 2280 means 22 mm by 80 mm. Socket 3 supports 2230, 2242, 2260, 2280, and 22110 modules, but the standoff position on your board decides what fits. Check the label next to the slot before ordering. Our M.2 form factors guide explains each size, and the M.2 2280 NVMe collection covers the most common one.

KingSpec M.2 Socket 3 SSDs at a Glance

Each drive includes an ultra-thin graphene heat sink to help hold stable speeds during long transfers and gaming sessions.

How to Confirm Your Motherboard Has Socket 3

Look for labels such as M.2_1 near the slot, then check the manual for M key, PCIe x4, or NVMe support. Some boards share lanes between M.2 slots and SATA ports, so using one can disable another. Once you know your slot, installation is quick, and our laptop SSD upgrade guide walks through the steps.

Why Buy From KingSpec

KingSpec pairs fast PCIe 4.0 performance with sizes for desktops, laptops, and handhelds, plus a 3-year storage device warranty and free shipping. Want more choices? Browse the full internal SSD range.

M.2 Socket 3 FAQs