The Intel Xeon 7120N was a server/workstation processor with 2 cores, launched in August 2006. It is part of the Xeon lineup, using the Tulsa architecture with Socket 604. Thanks to Intel Hyper-Threading the core-count is effectively doubled, to 4 threads. To further increase overall system performance, up to four Xeon 7120N CPUs can work together in a multi-processor (SMP) configuration. Xeon 7120N has 4 MB of L3 cache and operates at 3 GHz. Intel is making the Xeon 7120N on a 65 nm production node using 1,328 million transistors. The multiplier is locked on Xeon 7120N, which limits its overclocking potential.
With a TDP of 95 W, the Xeon 7120N consumes a good deal of power, so decent cooling is needed. Intel's processor supports DDR2 memory. ECC memory is supported, too, which is an important capability for mission-critical systems, to avoid data corruption. 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.