STARTECH PEX2PCIE4L PCI Express riser card 2×PCI 32-bit/33 MHz 2×PCIe x1

PCI Express Riser Card

The StarTech PEX2PCIE4L is a riser card that adds four expansion slots through a single PCI Express host interface. It provides two 32-bit PCI slots running at 33 MHz and two PCI Express x1 slots in a full-height form factor. This card suits technicians who need to install legacy PCI cards alongside modern PCIe devices in one system. Builders requiring more than four additional slots should look elsewhere.

Host Interface Limits

The card connects through a standard PCI Express host link, so total throughput is shared across all four slots. Each 32-bit PCI slot operates at 33 MHz, while each PCIe x1 slot uses a single lane. Bandwidth-intensive cards may not reach full speed when multiple slots are active simultaneously. Users needing dedicated bandwidth per slot cannot achieve it with this shared topology.

Four-Slot Capacity

The deciding specification is the total of four expansion slots: two PCI and two PCI Express x1. This fixed count determines whether the card matches the number of add-in boards you plan to install. If your build requires a different mix or a higher slot count, this riser will not fit the requirement.