The Xeon 5400 series is a line of server processors developed by Intel, released in 2007. These processors are based on the Core microarchitecture and are designed for multi-threaded applications, making them suitable for data centers and enterprise environments. They support up to 8 cores and utilize the LGA 771 socket. The Xeon 5400 series includes several models, such as the Xeon X5470 and Xeon E5450, which offer varying clock speeds and cache sizes. These processors are known for their energy efficiency and performance, providing a reliable solution for demanding computing tasks in server applications.