SMUGDESK NVMe Mini PCIe PCIe X1 to Dual PCI Riser Card ASM1083 60cm USB 3.0 Cable

Triple Input Compatibility

This adapter converts an NVMe M.2, Mini PCIe, or PCIe X1 host slot into two standard 32-bit PCI slots. It targets desktop builders and industrial users who need to run legacy PCI sound, network, or I/O cards on modern motherboards that lack native PCI connectors. The ASM1083 bridge chip handles the translation without requiring driver installation on most Windows 711 or Linux systems.

Dual PCI Output Capacity

The board provides two 32-bit PCI slots operating at 33 or 66MHz, giving enough bandwidth for typical legacy peripherals such as audio interfaces or industrial controllers. Bandwidth is limited to the upstream PCIe 1.1 x1 link at 2.5Gb/s, so high-throughput cards like RAID controllers or gigabit NICs will saturate the link and run below their rated speed. The 60cm USB 3.0 cable aids routing but does not increase available throughput.

PCIe 1.1 x1 Interface Limits

The ASM1083 chip is compliant with PCIe 1.1 and PCI 3.0 specifications, fixing the maximum signaling rate at 2.5Gb/s over a single lane. This ceiling is set by the host slot and bridge silicon, not by the cable length or slot count. Devices that expect PCIe 2.0 or 3.0 x1 speeds will negotiate down to 1.1, and multi-function cards share the single lane, so simultaneous heavy traffic on both PCI slots will contend for the same 2.5Gb/s pipe.