10G PCIe Network Adapter; SFP+ port for Optical Fiber Transmission and DAC cable - Hyper-fast 10Gbps speeds – Next-gen speeds up to 10X faster than gigabit Ethernet for quick file transfers, smooth 4K streaming and low-latency gaming. - Go-further fiber optics – The latest technology for high-speed transmissions over much-greater distances than copper cables. - Stylish built-in cooling – Stylish aluminum heatsink efficiently expels heat for reliable non-stop operation. - Automatic prioritization – Built-in QoS technology automatically boosts bandwidth to important streams or games. - Direct-attach copper (DAC)– With SPF+ Cage, DAC connections are also compatible.