1080Ti - what GPU type to best Sol/s?

Gaming X, OC, founder edition, armor,? I have already to buy 6x and no have known about few types of card. Thanks for help

so i want to know what is best way to buy ... exists more types of GPU

ASUS GeForce GTX 1080 Ti Founders Edition
ASUS ROG STRIX GAMING GeForce GTX1080Ti OC 11GB

GIGABYTE GeForce AORUS GTX 1080 Ti 11G
GIGABYTE GeForce GTX 1080 Ti Founders Edition 11G
GIGABYTE GeForce AORUS GTX 1080 Ti Xtreme Edition 11G

EVGA GeForce GTX 1080 Ti FTW3 GAMING ICX
EVGA GeForce GTX 1080 Ti SC2 Gaming ICX

MSI GeForce GTX 1080Ti ARMOR 11G OC

Thank you for your answer. The range of cards you provide covers almost every one I choose, so I still do not know what to buy. Do you have more details about these cards? I searched all the specifications, but some did not find me despite long searches.
I have a choice to buy after conversion of PLN to USD:
- GIGABYTE GeForce GTX 1080 Ti GAMING OC 11GB for 795USD
MSI GeForce GTX 1080 Ti GAMING X 11G OC for $ 856
- MSI GF GTX1080 Ti ARMOR 11GB GDDR5X 352BIT for 890USD
ZOTAC GTX 1080 Ti AMP Extreme CORE EDITION EU also for 890USD
- GIGABYTE GTX 1080Ti AORUS Xtreme Edition 11GB for $ 940
Asus GTX 1080 TI 11GB GDDR5X 352BIT also for $ 940

I am interested in which card has the best SOL value for the charged electricity. The main focus is ZCASH. The difference in prices is not too differentiated (even though I buy them 6), but the price of these cards is big enough that I prefer to receive good information and not spend that amount x6 on something that is weaker than "sister under another name." Thanks in advance for your next activity :slight_smile:

Gigabyte Aorus gtx 1080 ti 11gb xtreme edition is 850 dollars. I bought three trust me I know.