ethomaz said:
You have layers of sofware when you use a API to reach the hardware GPU... this is a example (there are mode layers between App and Hardware) In old windows it was something like: App > Direct3D > Windows Driver > GPU Driver > Hardware So what Mantles try? To remove all the Windows layers. Mantle: App > Mantle API > Mantle Driver > Hardare So Mantle have a low access to the driver compared with DirectX or OpenGL. PS4 seems to work directly to the driver level... a level below the Mantle on Windows OS. PS4, PS3, etc: App > PS4 Driver > Hardware Yeap... bettween all Driver and Hardware there is another layer with the Hardware firmware/rom but I didn't listed it... Sony changed the AMD driver to have direct access from the Tools... so you can choose to go right close to the metal using the low level API... a step lower than Mantle API. And she published the bashing to the WinOS in Xbone... not me. |
Besides some failures in your text (Mantle is not to get rid off all Windows layers) I said measure, not explain 
I know how it works but I want actual numbers. Everything else is just guessing how much additional layers *could* influence performance. And really, do you think MS did the same approach to Xbone like in Windows? Really? They didn't on Xbox, didn't on 360 and don't on Xbone, for obvious reasons.
