The Intel Pentium 4 1.8A was a desktop processor with 1 core, launched in July 2001. It is part of the Pentium 4 lineup, using the Willamette architecture with Socket 478. Pentium 4 1.8A has 256 KB of L2 cache and operates at 1800 MHz. Intel is making the Pentium 4 1.8A on a 180 nm production node using 42 million transistors. The multiplier is locked on Pentium 4 1.8A, which limits its overclocking potential.
With a TDP of 69 W, the Pentium 4 1.8A consumes typical power levels for a modern PC. Although the processor doesn't come with integrated graphics, certain motherboards with compatible chipsets can provide this capability.
Neither SSE3 nor SSE4 instruction sets are supported, which will lead to problems with games not starting.