okay,let me rephrase the question
is it
healthy harmful for my GPU?

edit:

yeah,I don't think I'm going to overclock it

That guy is a dummy.
As long as your temps aren't super high you'll be fine, my card has been overclocked for 4+ years, had months of mining etc, still going strong. Also I laughed that he thinks 60C is a high temp. My card is basically always at 75C+.
Download MSI Afterburner. With increased fan speed it's preeeety hard to overheat.
No I'm not a dummy. MSI Afterburner is good for an experienced overclocker, CCC is good for someone just starting out because the buttons allow for steps. Afterburner has only sliders that I find clumsy. I OC all the time. Without I get about 125Khs if lucky, with it, a consistent 325 with no overheating. Also it depends the make of the card. AMD for some reason runs hotter than MSI. My MSI gets 325 @75
o the AMD runs 88
o underclocked on the GPU Core hashing at 317 right now. I've been OCing for 15 years and never lost a mainboard or graphics card yet.
CCC also allows for auto fan speed control which will reduce the chance for overheating. Manual fan control doesn't allow for change in ambient temperature.
The only reason I didn't answer earlier is 'cause I was chowin'. But yes, as long as the card doesn't get super hot, you're okay.