STARTECH PEXUSB3S25 2 Port PCI Express USB 3.0 Expansion Card
- 2x USB Ports
- USB 3.0
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Adds two PCIe 4.0 x8 slots from a single x16 slot with 20 mm spacing and CPU 4-pin auxiliary power
This PCIe 4.0 x16 to dual x8 bifurcation card splits a single full-bandwidth slot into two x8 lanes. It targets builders whose motherboard BIOS supports x8/x8 mode switching and who need two expansion cards spaced closely together. The gold fingers use a 5U thickness for reliable contact.
The card draws auxiliary power through a CPU 4-pin connector and includes a 4-pin cable for the connection. A power-on LED indicator shows when the auxiliary supply is active. No active cooling is present so the card adds no fan noise to the system.
A clock-splitting IC manages signal integrity across both x8 links during continuous data transfers. The Gen4 connectors include dust plugs and snap retention to maintain contact under vibration. The 20 mm slot spacing is fixed and limits the physical width of cards that can be installed side by side.
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No published specifications for this item yet.
Insert the card into a PCIe x16 slot, connect the CPU 4-pin power cable, then set the motherboard BIOS to split the slot into x8/x8 mode.
The gold fingers use a 5U gold-plated finish for durability, and the Gen4 connectors include dust plugs to protect unused ports.
The card requires the motherboard to support x8/x8 bifurcation; without that BIOS option the second slot will not function.
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