3DMark is a repeatable synthetic benchmark which can show a representation of expected gaming level performance for your system and you can compare with others using similar hardware to see how well your rig stacks up.
3DMark is a UL Benchmark and if you would like to try it out on your rig, you can pick it up here! 3DMark Download
3DMark Firestrike shows more of the same with each board trading blows and the MSI falling a bit behind in 4K physics score.
Time Spy being a DirectX 12 benchmark has been interesting as it shows scaling which is repeatable and shows the ASUS board consistently on top of the CPU score while the graphics portion seems to go to Gigabyte with the higher Ring bus. but crank it up to 4K with Time Spy Extreme and suddenly teh tables turn and the Maximus XI Extreme pulls ahead.
PCMark 10 is a popular benchmark form UL and gives a great repeatable measure on multiple aspects of normal PC Usage. If you would like to check out PCMark on your system give it a try here! PCMark 10 Download
PCMark shows a flat line on Digital content creation while productivity is lead by MSI and Essentials taken by Gigabyte. The Maximus hangs in there but overall is middle of the pack even though it is within error margins it is still repeatable.