The StarTech PEX4M2 is a PCIe 4.0 x4 to M.2 NVMe SSD adapter card that lets you add high-speed NVMe storage to any desktop PC with an available PCIe slot. It is an ideal solution for users who need extra M.2 slots or want to upgrade from SATA SSDs.
Overview
The PEX4M2 supports PCIe 4.0 x4 interface delivering up to 16 GT/s bandwidth. It accommodates a single M.2 NVMe SSD in 2280, 2260, or 2242 form factors. The card comes with both full-height and low-profile brackets, making it suitable for various case sizes. It is powered directly from the PCIe slot, so no external power cable is needed.
Key Features
- PCIe 4.0 x4 interface with up to 16 GT/s data rate
- Supports M.2 NVMe SSDs (2280/2260/2242)
- Includes low-profile and full-height brackets
- Tool-free installation for easy setup
- Bus-powered via PCIe slot (no extra power required)
Compatibility Guide
The card works in any PCIe x4 or larger slot (x8, x16). When used in a PCIe 3.0 slot, the speed is limited to PCIe 3.0 x4. For boot drive usage, the motherboard BIOS must support NVMe boot. Most modern motherboards (Intel 100-series and later, AMD AM4 and later) support this. Always check your motherboard manual for NVMe boot compatibility.
Ideal Use Cases
- Adding NVMe storage when motherboard M.2 slots are full
- Upgrading from SATA SSDs to NVMe for faster load times
- Expanding storage in small form factor builds (ITX, microATX)
- Workloads requiring high sequential read/write speeds (video editing, databases)
Upgrade Considerations
To achieve full PCIe 4.0 performance, your CPU and motherboard must support PCIe 4.0. In PCIe 3.0 systems, the SSD will run at half the theoretical bandwidth. The card measures approximately 150 x 23 x 13 mm, so ensure there is enough clearance from adjacent components, especially large GPUs.