IbizaPocholo
NeoGAFs Kent Brockman
All this information is from a spanish website:http://soloxboxone.com/llego-la-hora-este-es-el-rendimiento-real-de-xbox-one-con-directx-12/
They claim this information is from an insider developer who works for this site occasionally.This information is "official" from documents of ms to the developers like the picture you can see.(they say)
The information more relevant via google translator:
Recently, Microsoft has released a new full manual on DirectX 12 for developers where finally puts us real examples of numbers and performance.
According to the documents we have been able to access the new Direct3D API will be the heart of DirectX 12. So far nothing we did not know already, but what is interesting is how does this new API to the console and allowing up to 50% extra CPU performance and up to 20% extra GPU.
In addition, Microsoft has continued to work on the tools to work with eSRAM console so it will be a new review which will optimize even more making it much easier in certain developments 1080p standard resolution is reached.
In addition, there is more data to extract the SDK provided by ID @ Xbox game developers such as the release of part of the memory stored in the NAND Flash 8GB chip we already knew its existence. These SDK confirm what many predicted. And this memory is currently used to record clips in Game DVR and DirectX 12 may use part of it for games but can not be used for the same functions as the DDR3 memory as this is rather slow.
Although not the only information we will share with you, if we wanted to mention improved multi-engine. With DirectX 12 This can be put to work in parallel with the 3D motor, computer and copy-latency engine speeding up the creation of each frame.