So where does Bonaire fit in? Bonaire is of course a GCN part; its a new microarchitecture thats technically different from Southern Islands, but on the whole its a microarchitecture thats extremely close in design to Southern Islands. In this new microarchitecture there are some changes among other things the new microarchitecture implements some new instructions that will be useful for HSA, support for a larger number of compute work queues (also good for HSA) and it also implements a new version of AMDs PowerTune technology (which well get to in a bit) but otherwise the differences from Southern Islands are very few. There are no notable changes in shader/CU efficiency, ROP efficiency, graphics features, etc. Unless youre writing compute code for AMD GPUs, from what we know about this microarchitecture its likely youd never notice a difference.