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Green circuit board with two M.2 slots and silver bracket

STARTECH

STARTECH DUALM2PCIECARDB laptop add-on card

SKU CH-RRDF-FYH2Y MPN DUALM2PCIECARDB

Adds two M.2 PCIe SSDs to a desktop via an x8 or x16 slot with bifurcation, supporting 2242, 2260, 2280 and 22110 drives at up to 7.8GBps each

  • Product typeAccessories
  • Add two fast NVMe SSDs to a desktop or server with a single x8 or x16 slot
  • Read and write up to 7.8 GBps per drive for responsive workloads
  • Supports 2242, 2260, 2280 and 22110 mm M.2 drives without extra drivers
  • Build software RAID arrays for redundancy or speed using Storage Spaces or mdraid
  • Vented full and low-profile brackets improve airflow to maintain drive performance

Dual M.2 PCIe adapter card

This dual-slot adapter installs two M.2 PCIe SSDs into an available PCIe x8 or x16 slot on a desktop, workstation or server. It is built for users who want to add high-speed NVMe storage without occupying drive bays. The card requires a platform that supports PCIe bifurcation to operate both drives simultaneously. It suits builders expanding internal storage on compatible motherboards.

PCIe bifurcation requirement

The adapter needs a motherboard or riser that can split a single x8 or x16 slot into multiple x4 links; without bifurcation only one drive will be detected. No on-board bridge or switch is present, so the host chipset must handle lane division directly. Software RAID such as Windows Storage Spaces or Linux mdraid can then combine the two volumes for redundancy or speed. Systems lacking bifurcation support cannot use this card as intended.

Vented brackets and drive support

Included full-height and low-profile vented brackets improve airflow across installed drives to aid thermal management. The M-key and B+M-key slots accept 2242, 2260, 2280 and 22110 form-factor SSDs using the NVMe protocol. No drivers are required on supported operating systems once the hardware bifurcation condition is met. Buyers whose platforms do not support bifurcation should consider alternative single-drive adapters.

How it compares

Measured against everything we stock in Laptop Expansion Cards, at today’s prices. Recalculated every night.

Price $62.99
Typical for this category: the median of 10 items is $64.49.

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Specifications

Product
Product typeAccessories
Size & build
Shipping weight0.45 kg
Package size292 × 173 × 33 mm

Questions about this item

Should I pick the full-height or low-profile bracket for my case?

Both full-height and low-profile vented brackets are included, so you can match either standard or slim chassis without extra parts.

What does the 7.8 GBps per drive figure mean once the card is installed?

Each M.2 NVMe SSD can reach up to 7.8 GBps sequential throughput, provided the host slot supplies enough PCIe lanes and the drive itself supports that speed.

How does the x8 or x16 slot and bifurcation requirement cap real-world performance?

The card needs a motherboard that splits an x8 or x16 slot into two x4 links; without bifurcation only one drive will be detected, halving total bandwidth.

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