The Intel Pentium III 550E was a desktop processor with 1 core, launched in October 1999, at an MSRP of $368. It is part of the Pentium III lineup, using the Coppermine architecture with Slot 1. To further increase overall system performance, up to two Pentium III 550E CPUs can work together in a multi-processor (SMP) configuration. Pentium III 550E has 256 KB of L2 cache and operates at 550 MHz. Intel is making the Pentium III 550E on a 180 nm production node using 28 million transistors. The multiplier is locked on Pentium III 550E, which limits its overclocking potential.
With a TDP of 15 W, the Pentium III 550E consumes very little energy. The highest officially supported memory speed is 133 MT/s, but with overclocking (and the right memory modules) you can go even higher. Actual memory technology support depends on the chosen motherboard, because the memory controller is located on the motherboard (not in the processor). Although the processor doesn't come with integrated graphics, certain motherboards with compatible chipsets can provide this capability.
Many games will refuse to start on this processor due to the lack of the SSE2/SSE3/SSE4 instruction set.