I actually never saw a single 1080Ti running without crashing with mem above +500. Most of them have problem with +400...
OTOH , the only 2 GTX-1080 (Not Ti) I have can run with +700 without crashing.
When everyone will understand that there is no +XXX on one GPU equal to +XXX on another?
Especially if you set P0 state.
Never, people are throwing some offsets of mem core and +% of power limit not knowing that these numbers alone meaning absolutely nothing. On one card +100 could be 1950 on other 1800mhz even the very same model. Also most of the high end cards(no matter the chip series) go different default TDP. For example, lowest 1070 got, 151W TDP, Jetstream got 170W, Zotac Amp Extreme got 250W, so 60% of each is totally different number!
Conclusion: People are jsut stupid and dont realize that little knowledge could increase their efficiency and profit!
About the Hash refinery pool and yiimp clones, best you can do is to mine algos with short block, like skein, nist5 and neoscrypt. WhyTF they mine lyra2v2 hitting 10 blocks per day, or skunk hitting five blocks per day or X17 hitting 30 blocks per day when neoscrypt for example is hitting 20-30 per hour! Use this:
http://pool.hashrefinery.com/site/multialgo. If you want to play lottery there better places.
Bet almost nobody disable P2 states on their Nvidia cards...