The Intel Pentium III 1000 was a desktop processor with 1 core, launched in June 2001. It is part of the Pentium III lineup, using the Tualatin architecture with Socket 370. Pentium III 1000 has 256 KB of L2 cache and operates at 1000 MHz. Intel is making the Pentium III 1000 on a 130 nm production node using 44 million transistors. The multiplier is locked on Pentium III 1000, which limits its overclocking potential. With a TDP of 27 W, the Pentium III 1000 consumes only 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.