I use Intel's graphics driver meant for Windows 8 on Windows Server 2012 running on my DC3217IYE. The two OSes are based on the same codebase. I recall that there was some strange warning or error message during the installation but it installed fine and it works for me. It was some months ago, so the driver version was in the 9.17.10.xxxx range back then.
BTW, your other unknown device might be part of the chipset features, so you might want to throw the "Chipset Device Software" package on there as well. I did and it worked fine. No yellow exclamation marks in the device manager.
Please note that even though the drivers may work for a different operating system the official supported ones are Windows* 7 and Windows* 8.