First Time Overclocking GPU

[TriedandTested]

Just got a new card, but don't know where to start really. Want to push this card a little and here's where it sits now. Air cooled. It's a Zotac GeForce GTX 1080 AMP Extreme Spectra. What should i start with? Are the 0Mhz basically indicating stock values? 1+ over that is where the overclocking begins?

 

[TriedandTested]

Thanks. I'll give those suggestions a try in the week. What's the difference between GPU clock and memory clock out of interest?