The AMD Opteron 854 was a server/workstation processor with 1 core, launched in August 2005. It is part of the Opteron lineup, using the Athens (E4) architecture with Socket 940. To further increase overall system performance, up to eight Opteron 854 CPUs can link up in a multi-processor (SMP) configuration. Opteron 854 has 1 MB of L2 cache and operates at 2.8 GHz. AMD is building the Opteron 854 on a 90 nm production process using 106 million transistors. The multiplier is locked on Opteron 854, which limits its overclocking capabilities.
With a TDP of 92 W, the Opteron 854 consumes a good deal of power, so decent cooling is needed. For communication with other components in the computer, Opteron 854 uses a PCI-Express Gen 2 connection. 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.