Mahogany PCIe Gen 4 Switch Evaluation Kit is based on Switchtec.

Is targeted for low-lane-count applications. Evaluation board supports up to 52 lanes in PCIe Gen 4 add-in card form factor and can enable fanout testing for enterprise servers and storage, industrial servers, networking equipment, video production and broadcasting equipment, and test and instrumentation equipment. Ships with necessary cables, screws/standoffs and user guide. Is compatible with software and test tools such as ChipLink.

Unigen Corp.
unigen.com

Microchip
microchip.com