I thought miners here might appreciate some knowledge share of these top of the line Nvidia 1080 ti cards. This took some trial and error, so my apologies for the length. Hopefully this helps someone.
First, I started with several 1080 ti founders edition cards. These cards run fast ~690-720 at around 70c. The issue for me was the noise. I wanted a semi-quiet rig that stayed very cool for longevity so I decided to pickup water cooling kits for these.
After installing an EVGA water cooler all-in-one for one of the cards, I found that it did stay considerably cooler but also ran much slower. Further, it became difficult to overclock because both EVGA Precision and Afterburner couldn't find the radiator or blower fans, and were stuck with the default gpu bios temp-arc settings. Also the kit fans are 3pin instead of PMW, so you're not able to plug these directly into the motherboard to control the radiator fan speed that way.
I decided this didn't meet the requirements of what I wanted to build, so instead I ordered the EVGA 1080 ti SC2 all-in-one cards with built-in water coolers.
There are some good things about these all-in-one cards: they easily run ~710 Sol/s out of the box at about 55c. These cards also have really great temperature sensors throughout the card that EVGA Precision has a nice interface for displaying. Further, both fans are controllable through Precision (not Afterburner, which doesn't recognize either fan).
The problem with these cards is when you try to run more than four. EVGA's Precision XOC limits you to four graphics cards and will tell you "too many gpus". This means that you can't overclock these if you have more than four cards because Afterburner can't control the fan speeds. Huge let down, but not enough to return them.
Next, I decided to dive into the new Corsair Hydro 1080 ti liquid cooled cards. These are by far the best option in my opinion.
First, the radiator fans are 4 pin pmw and plug directly into the motherboard sysfans or fan splitter. This is a huge win because it means you can get rid of EVGA Precision's 4 card limit and use Afterburner. Afterburner does correctly recognize the blower fan and lets you override the default speeds.
Second, these cards run 5-10% faster stock even than the EVGA all-in-one gpus. I'm overclocking these to 730-750 without breaking into high temps. These cards are excellent. The radiator fans are also quieter and higher quality than the EVGA all-in-one card stock fans.
Bottom line, if you're looking for longevity you might want to think about water-cooled 1080 ti cards and if you're looking to build a rig with more than four cards you should consider the new Corsair gpus. Sure they are about $100 more than non-liquid cooled, but they will stay cooler, last longer and have a three year manufactures warranty.
Last, I just wanted to make a comment about knowledge share. Yes, it will increase the mining difficulty having more miners with faster cards, but I think the ethos of this place is healthier if we can learn from each other. Further, I believe that the price increases as the difficulty increases, so it's actually a good thing having more miners mining Zcash. It also just feels right to pass on knowledge that others will benefit from and I hope others share that viewpoint.
I also want to make a shoutout to @cryptomined for his youtube videos that have helped thousands of newcomers get up to speed on mining.
Please share your thoughts/experiences here.