While I've so far only used Afterburner, it isn't the best option. Running VRMark (just to compare values) it consistently seriously lowered my score due to quite high CPU-usage (or thread-usage) on my i5-6500. Normally I get what other 1070 users get as well, however clearly my CPU is a potential limiting factor, and when it is, Afterburner is more trouble than it's worth.
That's why a much simpler tool would be appreciated, like FRAPS is for showing the frames, which doesn't affect the performance by the way.