There are several different companies that design microprocessors. There is Intel, AMD, Imagination (MIPS), and Oracle (Sun SPARC) to name a few. However, none of these companies is known exclusively for their power efficiency. One company that does specialize in energy efficient processors is ARM.
With its technology in 95% of today’s smartphones, it’s clear that ARM has a big part to play. Luckily the company has a storied history in the gaming world that dates back to the BBC Micro. It was ARM processors inside the ill-fated 3DO console, the first mobile to feature a game (Snake on the Nokia 6110), and a string of handhelds including the GBA, DS, 3DS, and the PlayStation Vita.