We were able to reach 490 on overclocked GTX 1080. We also noticed that temperature has some effect on all pascal cards - the higher it is, the lower it would clock and thus slower it would mine. But the hashing rate was always consistent, never more or less, as long as all clocks were fine. Also, if there is a driver crash due to too intensive clock, it may put your card into locked low clock and reboot is needed. That is all I can help you with. You may observe GPU load, TDP, memory load and see how these numbers compare to your first run of 500+.
Yeah, maybe i just have a freak card or something. I stopped/started the miner today and boom the 1080 is hashing 530+ SOL/sec. Image below
https://s27.postimg.org/rp95lmckj/1080.pngLol nice Hashrate, with GTX 1060 took me like 20 days to reach minimun payment with NiceHash, i had to move mining ZEC directly and seems more profitable. 1$ per day with 250SOL/sec. It's weid with NiceHash EQM give to me 210-250Sol/Sec 0 stability, but with another pool 250Sol/sec.
