The installation and setup of the ASUS P7H55D-M EVO was fast and easy. We had not problems getting everything to work for us. The EPU-6 software for this board was nice and was also able to throttle the GPU to help reduce the power consumption from the board.
Having said that, there were a few issues that made us a little concerned. When we first powered on the board it seemed to stutter, the fans would spin up, then seems to stop only to restart less than a second later. It was very odd to see that happen.
Our next little issue came in the form of the GPU, for some reason it would read 700MHz on some apps but would be set to 900MHz in the BIOS. This one seems to be related to the EPU-6 software. When set to auto it will throttle the GPU down to 700MHz, which is a good thing. The problem comes from when you check the GPU speed. Even if you have something graphical running (like Cinebench OpenGL test) the speed kicks in, but is not reported properly.
Still, this did not affect performance at all.