STARTECH PEXUSB3S25 2 Port PCI Express USB 3.0 Expansion Card
- 2x USB Ports
- USB 3.0
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Six PCIe 16x to 1x riser boards with 60cm USB 3.0 cables, 6-pin to SATA power, four solid capacitors and over-current protection
This kit contains six riser adapters that convert a PCIe 16x slot into a single-lane connection using a 60cm USB 3.0 cable. It is aimed at builders assembling multi-GPU mining rigs who need to space graphics cards away from the motherboard. Each riser draws auxiliary power through a 6-pin PCIe connector that is adapted to a 15-pin SATA plug. No drivers are required for installation.
The riser carries only one PCIe lane regardless of the physical slot used, so the connected device operates at x1 electrical width. Bandwidth is therefore limited to the throughput of a single lane, which restricts high-performance GPUs to reduced data rates. The 60cm cable length adds signal travel distance that can affect stability at higher signalling rates. Builders must accept this constrained link when planning their rig layout.
Each adapter board measures 13cm by 4.4cm by 1.2cm and includes four solid capacitors plus voltage regulation components for stable power delivery. A surface-mounted fuse provides overcurrent protection against short circuits. Gold-plated contacts on the PCIe connector resist oxidation over repeated insertions. Four mounting holes allow the riser card to be screwed securely to a frame, reducing strain on the USB 3.0 cable during daily operation.
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The kit contains six complete riser boards, each with its own 60cm USB 3.0 cable and 6-pin to SATA power adapter, so one pack covers a six-GPU mining rig.
The riser physically converts a 16x slot to a 1x electrical link; the GPU will run at 1x bandwidth, which is typical for mining workloads but reduces throughput for gaming or compute tasks.
The 6-pin PCIe to SATA cable draws auxiliary power directly from the supply, limiting the load on the motherboard slot and improving stability for multi-GPU setups.
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