Ive been running my GTX 1080 for over a year with +20% power/+100/+1000 mining equihash. It mines a good 20 hours out of the day, I only shut it of in the evenings if I am on the computer. So far I have seen no issues whatsoever with running it this hard. I also have 1070s running like this for over a year as well so I wouldnt think you would cause any damage as long as you keep temperatures in check.
I know when you set at +20% the card becomes hot and you'll smell something like melting plastic or rubber, especially if you're mining Ethereum. So, if I overclock all my graphics cards will they not be damaged? Well, you know graphics cards nowadays are too expensive and hard to find.
Also, may I know the required or safe temperature (°C) for the CPU and graphics card?
I have a maximum of 75°C, more than a year in this mode
Wow! What about the CPU, is it also 75°C? I'm using Intel Core i7 and once it reaches over 60°C I immediately set the CPU core to 3. So, running all my cards over 60°C would be safe enough. Thank you.
As long as you keep your card temperature below 65 degree celsius, you can overclock it to the max, it won't damage your card. The biggest damage a graphic card can receive is from excessive heating. Although Nvidia says that temperature limit is 95 degree celsius, that is only in theory. In practice I have seen so many burned Gtx 970 from my experience working as an IT, all because of excessive heating.
Thanks a lot for sharing... it's great knowing those things for newbies in the mining field like me.