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Black PCIe x16 card with two SFF-8654 ports, full-height and low-profile brackets

SoNNeT S55N216 PCIe 4.0 x16 to Dual SFF-8654 Adapter Card

SKU CH-P5XE-9HE7Q

Connects two U.2 NVMe SSDs via dual SFF-8654 ports using a PCIe 4.0 x16 slot that splits to 2x8 with bifurcation support

  • Adapter typeSATA
  • First connectorPci x 16
  • Second connectorPci x 16
  • Connector typeStandard
  • Product colorBlack
  • DetailsPci x 16, 0.1 L x 0.1 W x 0.1 H inches, 0.1 g, 10Gtek, S55N2
  • Supports two U.2 NVMe SSDs with PCIe 4.0 x8 bandwidth per port
  • Theoretical 6.9GB/s per port for high-performance storage workloads
  • Requires motherboard PCIe bifurcation (x16 to 2x8) for full dual-drive detection
  • Includes full-height and low-profile brackets for flexible system integration
  • Compatible with Windows, Linux and VMware operating systems

PCIe 4.0 x16 to Dual SFF-8654 Adapter

The SoNNeT S55N216 is a PCIe 4.0 x16 adapter card that adds two SFF-8654 ports for U.2 NVMe SSDs. It targets data-centre, server and high-performance workstation builds that need to add fast NVMe storage without occupying drive bays. The card requires a motherboard BIOS that supports PCIe bifurcation from x16 to 2x8; without it only the first drive will be detected. It is backward compatible with PCIe 3.0 and 2.0 platforms.

Dual 8-lane ports with 6.9 GB/s theoretical

Each SFF-8654 connector delivers an 8-lane PCIe 4.0 link to a U.2 NVMe SSD, giving a theoretical 6.9 GB/s per port. The adapter handles two drives simultaneously when bifurcation is active, but provides no SAS or SATA support. Systems without bifurcation support are limited to a single active drive, reducing total usable bandwidth by half.

Full-height and low-profile brackets included

The package supplies both full-height and low-profile brackets so the card fits standard and compact chassis. A separate SFF-8654 to SFF-8639 cable is required for each U.2 SSD and is not included. Compatible operating systems include Windows 10/11, Windows Server 2019/2022, Linux, VMware ESXi 7/8, FreeBSD 12/13, CentOS 7.9/9 and Ubuntu 22/24.

How it compares

Measured against everything we stock in SATA, IDE & M.2 Drive Adapters, at today’s prices. Recalculated every night.

Price $50.99
Pricier than about 76% of the 1,721 comparable items (median $22.99).

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Specifications

Product
Brand nameSoNNeT
Product lineS55N216
Model nameS55N216
Part numberS55N216(EU)
Product colorBlack
Adapter typeSATA
Ports & slots
First connectorPci x 16
Second connectorPci x 16
Connector typeStandard
Size & build
Product dimensions20'
Product weight0.1 g
In the box
In the boxClassic

Questions about this item

Will the SoNNeT S55N216 work in my older PCIe 3.0 motherboard slot?

Yes, the card is backward compatible with PCIe 3.0 and 2.0 slots, though each U.2 NVMe SSD will then run at the lower generation bandwidth.

How can I confirm both U.2 NVMe SSDs are detected after installing the S55N216?

Enter the motherboard BIOS and verify that PCIe bifurcation is set to x8+x8; both drives should then appear in the OS disk manager under Windows 10/11, Linux or VMware ESXi 7/8.

Does the S55N216 package include the SFF-8654 to SFF-8639 cables needed for my U.2 drives?

No, the box contains only the adapter card with full-height and low-profile brackets; two SFF-8654 to U.2 (SFF-8639) cables must be purchased separately.

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