Quad PCIe 3.0 x16 M.2 NVMe Switch Controller - Dedicated x4 per Slot

Our review of the Quad PCIe 3.0 x16 M.2 NVMe Switch Controller focuses on who benefits most: builders who need to connect four NVMe M.2 drives to a single PCIe x16 slot without sacrificing per-drive bandwidth. The card uses a PLX PEX8747 switch to present four dedicated PCIe 3.0 x4 links from one x16 upstream port, so each drive gets the full 32Gb/s theoretical throughput available from a Gen3 x4 NVMe lane. In testing and practical use the biggest reason to buy is straightforward: it unlocks near-native NVMe performance for multi-drive M.2 arrays in workstations or servers where additional full PCIe lanes are not available.

Key Features

• PLX PEX8747 switch: provides a PCIe 3.0 x16 upstream port with four downstream PCIe 3.0 x4 ports to keep each NVMe SSD on a dedicated high-speed link.
• Four M.2 connectors: supports 2242, 2260, 2280 and 22110 form factors so a variety of NVMe SSD sizes can be installed without adapters.
• Full Gen3 x4 speed per drive: each M.2 slot is allocated a dedicated PCIe 3.0 x4 bandwidth path, helping multi-drive setups avoid bandwidth contention.
• All-aluminum casing: the metal housing conducts heat away from SSDs and works with the integrated fan and heatsink to manage temperatures under sustained load.
• Server and workstation fit: designed to mount in a PCIe x16 slot, making it suitable for high-end desktops and rack servers that need extra NVMe capacity.

Who It's For

This card is aimed at system builders, IT professionals and power users who need to attach multiple NVMe drives while retaining per-drive performance, such as for fast local storage pools, scratch disks for video editing, or OS plus cache arrangements. It is best when installed in platforms with a free PCIe 3.0 x16 slot and where BIOS/OS support for NVMe devices is available.

Users who should look elsewhere include those who require hardware RAID with integrated parity across drives or those on motherboards that lack a full x16 link to the slot; this card is a PCIe switch and not a RAID controller, so dedicated RAID cards or native motherboard M.2 lanes may be preferable for simpler single-drive needs.

Pros & Cons

Pros

• Gives each NVMe drive a dedicated PCIe 3.0 x4 link to preserve drive performance in multi-drive setups.
• Supports common M.2 lengths 2242 through 22110, removing the need for additional adapters.
• All-aluminum body with a fan and heatsink helps maintain thermal stability under load.
• Works in a single PCIe 3.0 x16 slot, conserving motherboard connectors for other devices.

Cons

• Not a RAID controller: it is a PCIe switch, so users seeking built-in RAID features must add separate RAID software or hardware.
• Requires a full PCIe 3.0 x16 host link to deliver the intended per-drive bandwidth, which some systems may not provide.

Specifications

Model	Quad PCIe 3.0 x16 M.2 NVMe Switch Controller (NV9547-4I)
Chipset	PLX PEX8747 switch controller
Interface	Host: PCIe 3.0 x16 upstream; Downstream: 4 x PCIe 3.0 x4
M.2 Connectors	4 x M.2 (supports 2242, 2260, 2280, 22110)
Cooling	All-aluminum casing with integrated fan and heatsink
Target Platforms	High-end desktop/workstation and server PCIe x16 slots

Our Verdict

For builders who need four NVMe drives and want to maintain near-native PCIe 3.0 x4 performance per drive, this switch card is a practical, cost-effective choice. It delivers dedicated lanes via the PLX switch and includes thermal measures that suit sustained workloads, making it a solid option for workstations and servers that lack multiple native M.2 slots.

Frequently Asked Questions

Will this card provide full speed to each NVMe SSD?
Yes; when installed in a PCIe 3.0 x16 slot the PLX switch allocates a dedicated PCIe 3.0 x4 lane to each M.2 connector, preserving per-drive throughput.

Does this card handle hardware RAID?
No; this unit is a PCIe switch providing lane allocation and thermal management, not an integrated RAID controller, so hardware RAID requires a separate controller.

What M.2 sizes are supported?
The card supports 2242, 2260, 2280 and 22110 M.2 NVMe SSD form factors without adapters.