Raspberry Pi 4 WiFi 2GB RAM, 8GB eMMC Computing Module

About the Computer Module Raspberry Pi 4 WiFi 8GB/2GB

However

If the wireless connection is not required, since the Raspberry Pi Compute Module4 features an integrated Gigabit Ethernet PHY, it only needs a 1:1 RJ45 standard connector to provide an ethernet connection to CM4.

CM4 has an internal host controller

PCIe (Peripheral Component Interconnect Express) 2.0 x1, which means that the user can connect the board to high-speed components such as GPUs, RAID cards, Wi-Fi cards or solid-state drives (SSD).