while mining...
1. how much power does an optimized system with one 1080 ti roughly consume?
2. how much would a whole setup with x4 1080 ti´s consume?
3. how accurate is whattomine with its numbers?
1. Depends on which algo. Equihash will get around 180W per card.
2. Again depending on the algo and TDP setting. Around 900W on the plug.
3. Usually accurate unless sharp network difficulty rise / netowrk delays.