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Green circuit board with white PCIe x16 slot and blue USB 3.1 connector, flexible ribbon cable attached

SMUGDESK

SMUGDESK PH40 PCIe x1 to x16 GPU Riser Adapter USB 3.1

SKU CH-NN5V-3C0TF

Converts a PCIe x1 slot into a full x16 interface for external GPU use via USB 3.1 cable

  • Converts PCIe x1 slot into x16 for external GPU
  • USB 3.1 cable delivers stable high-speed data link
  • Full interface design supplies sufficient power for continuous operation
  • Suits desktop GPU upgrades and multi-GPU mining rigs
  • Compact plug-and-play build needs no chassis modification

Converts PCIe x1 to x16 slot

This adapter turns a single PCIe x1 motherboard slot into a functional PCIe x16 interface for an external graphics card. It targets desktop builders who lack internal x16 slots or chassis space for a full-length GPU. The design supports DIY graphics upgrades and multi-GPU mining rig assembly on mainstream desktop platforms.

Uses USB 3.1 cable for data link

A high-speed USB 3.1 transmission wire carries data between the host slot and the external GPU. The cable enables stable communication while the card’s full interface layout supplies power to the graphics board. No other interconnect standard or version is involved in this connection.

No extra accessories included

The unit ships as the riser card and USB 3.1 cable only; no mounting brackets, external power modules or driver discs are bundled. Builders must source their own GPU retention method and ensure the power supply can feed the graphics card directly.

How it compares

Measured against everything we stock in Interface & Card Adapters, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 70% of the 354 comparable items (median $21.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How does the PCIe x1 to x16 conversion affect GPU performance in a real desktop?

The adapter lets you install a full-length graphics card through a single x1 slot, so bandwidth is limited to the x1 link speed rather than a native x16 connection.

What practical bandwidth limit does the USB 3.1 cable impose on the GPU link?

The USB 3.1 cable carries the PCIe signals, so the effective throughput is capped at the USB 3.1 signalling rate, not the full PCIe x16 potential.

What physical space and power connections does the riser card need to mount a graphics card?

The compact board plugs into a PCIe x1 slot and provides a standard x16 slot for the GPU; the USB 3.1 cable routes to the card for data and the full interface design supplies the necessary power pins.

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