if you asking me on the nice way i would be happy to post some picture as i always did when i posted something on this forum , but never going to share how i did it 
Says EVERYONE who has nothing to back his/her claim, forget how you did it, you cant even share pics of the result, and expect to be believed ...
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Times changed , you learned a lot in the past few months , now you think 10 cards setup (same kind ) is impossible JUST WAIT ANOTHER 6 MONTHS , BY THEN YOU MIGHT GOING TO FIND OUT HOW YOU CAN DO 10 CARDS SETUP EASY 
JUST WAIT ANOTHER 6 MONTHS , BY THEN YOU MIGHT GOING TO FIND OUT HOW YOU CAN DO 10 CARDS SETUP EASY True, I lived, I learned. Till then the only people who were successfully running more than 7 cards were doing so on modded bios'es on Z97 motherboards. h81 or h85 boards did not support more than 7, Then came the Z1xx series which was a disaster for mining, but with proper bios mods the Z170's could support 8 as well. But the real change came with the Z2xx series when everyone and their mum could run 8 cards easy.
I learned from people who had actually done the 8 card setups and could demonstrate/prove it, so that changed my attitude towards the max no of cards.
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HINT 
as you can see in the first post , 9 cards showing up under windows device manager , its actually 10 cards (incl itel hd 510), so windows ok with the cards , but the miner program is not ... think strong why windows ok with 9 cards ( the same kind ), working fine , no error under device manager but the miner program is not running fine ? Go to the details deeper , you might can find the answer ( did you see the "hole of ignorance" )
as you can see in the first post , 9 cards showing up under windows device manager , its actually 10 cards (incl itel hd 510), so windows ok with the cards , but the miner program is not ... think strong
why windows ok with 9 cards ( the same kind ), working fine , no error under device manager but the miner program is not running fine ? Go to the details deeper , you might can find the answer ( did you see the "hole of ignorance" ) Yes windows can see 9, 10 even 11 GPU's in my testing, but they will not work with any GPU intensive program, so the maximum usable cards is 8. More than that and the system crashes.
But ill leave you with a nugget, get in touch with jstenfanop on these forums and hell "Educate" you on max GPU limits, what you can and cant do etc. And next time when someone asks for proof, show up or shut up.