Most high performance servers have 10 Gigabit Ethernet (10GE). A growing number of users are choosing 10GBase-T interfaces with twisted pair cables in place of SFP+ modules and optical cables. The introduction of Intel Romley processors has caused a step change in the demand for 10Gbit/s interfaces on servers. This report details and analyzes 10GBase-T PHY devices, controller/MAC devices and 10GBase-T adapters, identifying the key requirements and highlighting the advantages they hold for equipment manufacturers and users. It also reviews vendor strategies and surveys component features, performance and flexibility.