Is GDDR5 specs good for mining?
How much power GTX 1080 consumes?
1080 has GDDR5X
yes, but is it good for long term point of view and efficiency?
No offence mate but it looks like you were answered your questions above but you keep asking them over again. And I agree with ivakar here, 1080ti rules, then 1070 comes next after it.
can you tell which coins are best to mine on GTX 1080 and its power consumption on those coins?