Yep MSI AB is a nice tool imo as someone mentioned above, will work fine with the ASUS. Also has some monitoring built in and graphs. Combine with the rivatuner app which downloads at same time and you will be able to log plenty of statistics and get pretty much any ingame OSD up and running with whatever stats you want. GPU-Z is also a nice tool to check things like voltages your hitting.
As for clock speeds, make sure to compare apples to apples, you can hold a much higher clock speed in say AC Valhalla, then a game like Control or Port Royal Ray traced which suck down the power.