This is an Arnold render benchmark to test your pc power! It is a pretty simple Maya render scene, you can simply download it and run one of the two files I created. One is a faster test (around 5 minutes on a pretty decent cpu), the other is way much heavy and slow. You can use this last one to also test the stability of your system. Take a look to the results at the bottom to compare your cpu speed.
Arnold render cpu benchmark (fast)
Once downloaded, be sure to set the render resolution in the maya render window to 100% (1100x620). Just take a look at the instructions below.
These results are obtained using maya 2018 update 1, Arnold 2.02 for Maya, fast benchmark 1100x620px