1× X16 → 10× X8 — Powered by a Broadcom PEX88096 switch chip, expands one PCIe 4.0 x16 slot into ten independent x8 slots for GPUs, NVMe adapters, or NICs.
PCIe 4.0 Packet Switch — Unlike passive splitters, the onboard switch manages traffic intelligently; all ten slots share the x16 upstream bandwidth at full 16GT/s.
0.7m SlimSAS Extension — Ten 0.7m SlimSAS SFF-8654 cables let you mount all ten device slots up to 0.7 meters away for flexible layouts and better airflow.
Complete 10-Slot Kit — Includes switch host card, 10 SlimSAS cables, and 10 daughter cards with 4-pin power connectors — ready to deploy out of the box.
Active Cooling, Server Grade — Built-in fan keeps the PEX88096 cool under full load; ideal for servers, GPU clusters, NVMe storage arrays, and AI/ML builds.

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Description

ST5136 PCIe 4.0 Switch Expansion Kit — Turn One x16 Slot into Ten Remote x8 Slots

The ST5136 is a PCIe 4.0 switch-based expansion solution designed for servers, workstations, and high-density computing environments. Built around the Broadcom PEX88096 PCIe 4.0 packet switch, it consists of three components that work together:

Switch Host Adapter Card — A PCIe 4.0 x16 to 10-Port SlimSAS SFF-8654 adapter with an onboard PEX88096 switch chip and active fan cooling. It plugs into your motherboard's PCIe 4.0 x16 slot (upstream) and provides ten SlimSAS outputs (downstream).
Ten 0.7m SlimSAS SFF-8654 Cables — High-quality shielded SlimSAS SFF-8654 cables that carry the PCIe 4.0 signal reliably over a distance of 0.7 meters (27.5 inches).
Ten Daughter Cards — Each SlimSAS SFF-8654 to PCIe 4.0 x8 daughter card converts the cable signal back into a standard PCIe 4.0 x8 slot, with a 4-pin power connector for stable power delivery.

Why you need it:
Modern servers and storage arrays often need far more PCIe slots than the motherboard provides. With the ST5136, a single PCIe 4.0 x16 slot becomes ten PCIe 4.0 x8 slots — all sharing the x16 upstream bandwidth through intelligent packet switching — and those slots can sit up to 0.7 meters away from the motherboard. Install up to 10 GPUs, NVMe adapter cards, network cards, or other PCIe devices with flexible placement for optimal cooling and cable management.

Specifications: