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Green PCIe card with two U.2 SFF-8639 connectors

eshinreal

eshinreal PCIe to 2 U.2 SFF-8639 NVMe Adapter Card

SKU CH-BMVX-WJDXB

Connects two U.2 NVMe SSDs via one PCIe 3.0/4.0 slot for high-speed storage arrays

  • TypeController Card
  • Connect two U.2 NVMe SSDs through one PCIe slot
  • Achieve up to ~4GB/s per drive with PCIe 3.0 x4 lanes
  • Operates without extra power cables drawing from the PCIe slot
  • Requires motherboard PCIe bifurcation to split lanes between drives
  • Compatible with Windows, Linux and macOS for enterprise workloads

Dual U.2 NVMe Adapter for Enterprise Storage

The eshinreal PCIe adapter card connects two U.2 SFF-8639 NVMe SSDs through a single expansion slot. It targets workstation, server and NAS builders who need high-speed storage arrays without using multiple motherboard slots. The card draws power directly from the PCIe interface and operates with passive cooling.

PCIe 3.0/4.0 Bifurcation Requirement

Full NVMe bandwidth for both drives depends on motherboard support for PCIe bifurcation such as x4/x4 or x8/x8/x4 lane splitting. Without bifurcation the second SSD will not be detected or will run at reduced speed. The card is compatible with PCIe 3.0 and 4.0 slots at x8 or x16 electrical widths.

Verify Motherboard Bifurcation and Bracket Fit

Check your motherboard manual to confirm the specific PCIe slot supports bifurcation and the required lane configuration. Ensure the chosen bracket height matches your chassis because low-profile and full-height options may be supplied. Confirm operating system driver support for your Windows, Linux or macOS environment.

Highlights

  • Connect two U.2 NVMe SSDs through one PCIe slot
  • Achieve up to ~4GB/s per drive with PCIe 3.0 x4 lanes
  • Operates without extra power cables drawing from the PCIe slot
  • Requires motherboard PCIe bifurcation to split lanes between drives
  • Compatible with Windows, Linux and macOS for enterprise workloads

Specifications

TypeController Card

Questions about this item

Should I pick the x8 or x16 slot version for two U.2 NVMe drives?

Both slot widths work; the card needs a motherboard that can bifurcate the lanes into two x4 links so each SSD gets a full x4 path.

What does the ~4 GB/s per drive figure mean once the card is installed?

It is the peak sequential bandwidth each U.2 NVMe SSD can reach when the host provides a PCIe 3.0 x4 connection to that drive.

Does the SFF-8639 interface limit speed compared to a direct motherboard U.2 port?

No — SFF-8639 is the standard U.2 connector, so the adapter passes the PCIe 3.0 or 4.0 x4 lanes through without adding a bottleneck.

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