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Blue circuit board with M.2 M-key edge connector and four PCIe x1 slots linked by USB 3.0 cable

Vszerda

Vszerda M.2 M Key to 4 Port PCI-E 1X Riser Card

SKU CH-8DFW-2NC6R

Adds four PCI-E 1× slots via an M.2 M-key or PCI-E 1× link connected by USB 3.0 cable, delivering about 150 MB/s per slot for low-bandwidth devices

  • Expands one M.2 M Key slot into four PCI-E 1X ports
  • Adds four PCI-E 1X slots via a single PCI-E x1 connection
  • Works with Windows, Linux and macOS without extra drivers
  • Theoretical 625 MB/s link drops to about 150 MB/s per port after overhead
  • Requires host slot PCI-E 2.0 or 3.0 for reliable operation

M.2 M Key to 4-port PCIe 1x riser

This adapter splits a single M.2 M Key or PCIe x1 slot into four PCIe x1 connections using a two-board design linked by a USB 3.0 cable. It targets miners or hobbyists who need extra low-bandwidth slots for additional cards. The kit includes the main card, the device card and the interconnect cable. Compatible with Windows, Linux and macOS systems.

Installation notes and common issues

The main card plugs into an M.2 M Key or PCIe x1 slot while the device card provides the four x1 slots; a USB 3.0 cable bridges the two boards. Builders must supply auxiliary power via the onboard 6-pin SATA connector. The USB 3.0 link caps theoretical throughput at 625 MB/s and real-world bandwidth drops to roughly 150 MB/s shared across all four ports. Bandwidth contention is the typical bottleneck.

Bandwidth limits of the PCIe 1x interface

Each PCIe 1.x lane delivers up to 250 MB/s, but the USB 3.0 bridge restricts aggregate throughput to about 150 MB/s across the four slots. This makes the card unsuitable for high-performance GPUs, fast storage or any workload needing sustained throughput. It works only for low-bandwidth devices such as additional mining risers or basic I/O cards. The host slot should be PCIe 2.0 or 3.0 for best stability.

Highlights

  • Expands one M.2 M Key slot into four PCI-E 1X ports
  • Adds four PCI-E 1X slots via a single PCI-E x1 connection
  • Works with Windows, Linux and macOS without extra drivers
  • Theoretical 625 MB/s link drops to about 150 MB/s per port after overhead
  • Requires host slot PCI-E 2.0 or 3.0 for reliable operation

Specifications

No published specifications for this item yet.

Questions about this item

How can I verify the card is working after setup?

Check Device Manager for four PCI-E x1 links; each should show a 250 MB/s single-channel bandwidth at PCI-E 2.0 or 3.0.

What comes in the box and what must I buy separately?

The package includes the PCIe 1X multi-port riser card and one connection line; you must supply your own Sata power cables for the device card.

Which version should I choose, M.2 M Key or PCI-E x1 main card?

Use the M.2 M Key port if your motherboard has a free M.2 M Key slot; otherwise install the main card into a PCI-E x1 slot — both deliver the same four x1 ports via USB 3.0 at 625 MB/s theoretical bandwidth.

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