Ummm.... How exactly is this due to AMD or Mantle? From what I've read, DirectX 12 development started 4 years ago. Mantle was only announced back in September. Do you have even the slightest clue how long it takes to develop and test such an extensive API? MS doesn't and simply can't do all the work on their own. AMD, NVidia and Intel are all involved in the development of Direct3D. Remember, it was (only) an AMD rep that claimed that there was no DirectX 12 coming..... MS stated that the AMD rep was wrong. I find it funny how "amd fanboys" want to give credit to AMD for something that AMD didn't actually cause. It's kind of like the "nvidia fanboys" claiming that Freesync is a direct result of G-Sync even though AMD intends on using a feature of the VESA standard that existed prior to G-Sync....and that AMD's hardware supported prior to G-Sync as well. Fanboys will be fanboys, but both sides need to get their facts straight. AMD started working towards variable refresh 4 generations ago....and MS reportedly started working on DX12 (with AMD, NVidia and Intel) 4 years ago. PS4 doesn't run Windows. DirectX is a Windows based API. PS4 competes against XBox. Why would MS spend money developing something, just to give it to their competition who has their own graphics and audio API for their own platform? No other version of DirectX has been permitted to be run on a Playstation to my knowledge.