The Intel Xeon 5080 was a server/workstation processor with 2 cores, launched in May 2006, at an MSRP of $851. It is part of the Xeon lineup, using the Dempsey architecture with Socket 771. Thanks to Intel Hyper-Threading the core-count is effectively doubled, to 4 threads. To further increase overall system performance, up to two Xeon 5080 CPUs can work together in a multi-processor (SMP) configuration. Xeon 5080 has 2 MB of L2 cache per core and operates at 3.73 GHz. Intel is making the Xeon 5080 on a 65 nm production node using 376 million transistors. The multiplier is locked on Xeon 5080, which limits its overclocking potential.
With a TDP of 130 W, the Xeon 5080 consumes a lot of power, so good cooling is definitely needed. Intel's processor supports DDR1, DDR2 and DDR3 memory with a dual-channel interface. ECC memory is supported, too, which is an important capability for mission-critical systems, to avoid data corruption. Actual memory technology support depends on the chosen motherboard, because the memory controller is located on the motherboard (not in the processor). This processor lacks integrated graphics, you might need a graphics card.
The SSE4 instruction set is not supported, which can cause problems with modern games, as they require that capability.