I have this same question except for Windows 8.1 x64. I am currently using the Intel HD Graphics (IronLake) 126.96.36.19900 driver but it has issues connecting to the HDMI in of Xbox One. It will connect, then disconnect 5 seconds later, then connect, and repeat this connect/disconnect process infinitely. I have tested other PCs and HDMI cables which work fine with Xbox One.
Guys, the Intel® HD Graphics driver for Windows 8 and Windows 8.1 are provided by Microsoft within your Windows (32-bit, 64-bit) installation. This is what we called an Inbox driver, and this is a native driver that is supplied with the Operating System.
In other words, the driver is automatically installed during installation.
If you are looking for an updated driver, they are available through Microsoft Windows Updates.
See the following URL for additional information: