Overview
The StarTech.com PEXUSB3S4V is a PCI Express expansion card that adds four USB 3.2 Gen 1 (5Gbps) Type-A ports to any desktop PC. It's an ideal solution for users who have run out of rear USB ports or need reliable, direct connections for multiple external drives.
Key Features
- Four USB 3.2 Gen 1 ports, each delivering up to 5Gbps
- PCI Express 2.0 x4 interface — works in x1, x4, x8, and x16 slots
- Powered by a Renesas uPD720201 controller for stable performance
- Includes full-height and low-profile brackets for flexible case fit
- Compatible with Windows, Linux, and macOS
Compatibility Guide
The card uses the PCIe 2.0 x4 standard but is backward-compatible with all PCIe generations (3.0/4.0/5.0). It will fit into any available x1 or larger mechanical slot. The card works in ATX, MicroATX, and Mini-ITX motherboards provided there is a free PCIe slot. For small-form-factor cases, replace the bracket with the included low-profile bracket.
Ideal Use Cases
- Adding high-speed USB ports to older or budget desktops lacking USB 3.0
- When a USB hub introduces latency or insufficient power for external drives
- For users connecting multiple external SSDs or backup drives simultaneously
- A quick upgrade for office PCs that need faster data transfer for external media
Upgrade Considerations
The PCIe 2.0 x4 connection provides up to ~2 GB/s of bandwidth (unidirectional), which is ample for four 5 Gbps USB ports in typical mixed usage. However, if you plan to daisy-chain multiple high-performance NVMe enclosures, consider a PCIe 3.0/4.0 x4 USB 3.2 Gen 2 card for higher burst speeds. The card draws all power from the PCIe slot — no extra PSU connection needed.