is it safe to overclock the max dynamic frequency? and is it as effective as overclocking the integrated graphics core clock?

I will be overclocking the graphics of one of the new Pentium processors. I have two questions.

First question: Is it safe to overclock the max dynamic frequency?

Second question: Is Intel's software for deciding when the integrated graphics card can go faster reliable, or would I be better off overclocking the core clock?

The reason I'm asking this is because I don't feel comfortable adjusting the core clock. I would rather adjust the max dynamic frequency. And for anyone who doesn't know what max dynamic frequency is, it is explained in this forum post: http://www.tomshardware.com/answers/id-1905048/graphics-max-dynamic-frequency-intel-graphics-feature.html