Without knowing more about Polaris, we can't say for certain what the PlayStation 4's upper performance boundary is, but we can take a rough guess at what the minimum performance improvement looks like. While the comparison is not exact, the GPU inside the PlayStation 4 closely resembles a trimmed version of AMD's HD 7870 / R9 270. It so happens that AMD sold a Hawaii-class GPU with exactly 2x the R9 270's core count -- the R9 290. Eyeballing the performance improvement from the R9 270 to the R9 290 should give us a very rough idea of what to expect (Anandtech's Bench tool(Opens in a new windo