Windows 10 free upgrade is now out and I just finished reading a review in the August APC magazine which in reference to gaming talks of its DX12 support. It talks of a few 'significant' improvements.
First is a much lower-level of code access to GPU silicon for higher performance gaming.
Early Intel testing suggests reduced CPU power consumption by greater than 50% on a SurfacePro3 but the most impressive addition is the ability to combine discrete and integrated GPU's into live gaming. "Multiadapter" brings your CPU's integrated graphics engine back into service alongside your GeForce or Radeon card. Your card will handle the main frame rendering with the integrated adding post processing effects.
Results so far indicate a 10% boost in game frame rates from your existing hardware. (as long as you have a Geforce 600 series/Radeon HD7000 series or newer card).
Any one taken the leap yet to upgrade?