 "The Silicon lottery" is a term used by overclocking enthusiasts to describe components that turned out better during the manufacturing process, therefore making them more durable (this can also arise with CPUs, but is most often referenced concerning GPUs), capable of handling the pressure of overclocking better; meaning more overclocking headroom.Regardless, GPUs are the most popular component to overclock despite downsides.In terms of complexity, RAM (Random-access memory) is closely tied with CPUs, but performance gains are not as significant.