HP 665243-B21 10Gb 2x 560FLR-SFP+ Adapter

The HP 665243-B21 10Gb 2-Port 560FLR-SFP+ Adapter is a high-performance networking card designed for HP ProLiant servers equipped with FlexibleLOM slots. By using the dedicated FLR bay on the server motherboard, this adapter delivers dual 10Gbps SFP+ connectivity without consuming a standard PCIe expansion slot, leaving those slots available for storage controllers, GPUs, or other expansion cards. Each of the two ports supports full 10Gb line-rate throughput, and the adapter is optimized for low latency, making it an excellent choice for environments running heavy virtualization, iSCSI storage traffic, or latency-sensitive applications.

The 560FLR-SFP+ supports advanced features including SR-IOV for direct virtual machine access to network hardware, as well as multiple queue technologies that improve performance under VMware, Hyper-V, and Linux KVM hypervisors. The SFP+ interface provides flexibility in cabling, accepting both optical transceivers for longer runs and cost-effective direct-attach copper cables for short in-rack connections. For data center teams standardized on HP ProLiant infrastructure, this adapter offers a clean, integrated path to 10Gb networking with enterprise-grade reliability.