Based on the Broadcom BCM57504 (4-port) controller. Supports 10/25Gb/s connectivity; other speeds currently not supported. PCIe 4.0 x16 host interface. Available adapter form factors:. PCIe low profile form factor. OCP 3.0 SFF form factor. Supports Message Signal Interrupt (MSI-X). Interrupt coalescing. Four SFP28 external connectors supporting a transceiver, direct-attach copper (DAC) cable or active optical cable (AOC). Network boot - PXE, UEFI. Support for PXE boot (iSCSI boot and Wake-on-LAN (WOL) are not supported). Fully compliant with the SFF-8402 standard. Virtualization. RDMA over Converged Ethernet (RoCE). Integrated Flow Processing. Data Center Bridging. Manageability. Power Saving. https://lenovopress.lenovo.com/lp1652-thinksystem-broadcom-57504-25gbe-ethernet-adapters#introduction. .