If rumor comes true then, the Galaxy S 4 might also end up using the PowerVR SGX 544. Interestingly, it seems that Samsung will use a three-core version of the graphical chip running at up to 533MHz.
It’s not yet clear why Samsung went with Imagination Technologies’ PowerVR chip instead of the Mali, but we’re sure we’ll start hearing more on this very soon as the Galaxy S IV will get officially unveiled tomorrow. We - of course - will be covering it all live, so stay tuned.
source: Anand Tech, Imagination Technologies