The Intel Atom Z515 was a mobile processor with 1 core, launched in April 2009. It is part of the Atom lineup, using the Silverthorne architecture with BGA 441. Atom Z515 has 512 KB of L2 cache per core and operates at 1200 MHz. Intel is making the Atom Z515 on a 45 nm production node using 47 million transistors. The multiplier is locked on Atom Z515, which limits its overclocking potential.
With a TDP of 1 W, the Atom Z515 consumes extremely little energy.
The SSE4 instruction set is not supported, which can cause problems with modern games, as they require that capability.