It's plausible that PS5 will use Ryzen. The first apu based on Ryzen,will come sometime this year,and will have 12 compute unit's. It will be a apu geared towards enterprises. So that a apu,with a lot more compute unit's will be ready for PS5 launch is within reach. What other choice would it be,if they stick with using AMD apu's? Besides.i think we can say with absolute certainty that they will be using a x86,so backwards compatibility is pretty much guaranteed. The reason PS4 isn't backwards compatible with PS3,has nothing to do with greed from Sony's part,but because of the architecture of PS3,which is very complex,and based on a very different type of cpu. In some cases,the Cell BE that are used in PS3,beat PS4 in performance.







