What's the difference between 8 pin to 2 6+2 pin and 6 pin to 2 6+2 pin? I cant seem to find the first one in my country at all. Would the 6 pin to 2 6+2 pin work too? What's the actual difference?

Is there any possible way I could make this work ??
my risers came with 6 pin slot and with a 6 pin to sata cable.
please help! I cant find a psu above 750W in my country

Well, I am planning to undervolt the gpus or, I have another psu coming soon, a smaller 750w and I could let that psu run 5 gpus and the 6th I could put in my personal pc.
I did some research and I found out that I need some 6 pin to 2 x 8 pin connectors.
This is the cable:
http://www.cel.ro/cabluri-componente/cablu-delock-pci-express-6-pin-la-2x8pin-pMyYzMDAs-l/?utm_source=shopmania&utm_medium=cpc&utm_campaign=direct_link

also cpu is celeron g3900

Hello everyone.
After a few days after ordering 6 gtx 1070 ftw gaming acx 3.0 I found out that they come with 2 x 8 pin connectors. My PSU hx1050 only comes with 6 of these cables. So if I have to connect 2 x 8 pin to 2+6 pin connector to a gpu I could only run 3 of these cards ? Am I right ? I am so devastated after finding this out as I only have this psu...
Maybe I dont rly have to connect 2 x 2+6 pin connectors to gpu, maybe it would work with only one? Thanks in advance for trying to help me ! I am really sad

hello. I have the same gpus. have you found out how to make them all work ? I could also hook 3 gpus at max if so... reply pls!

Hello everyone! I am sorry if I am not posting in the right section! I am starting now with my first rig (I know, it might just be too late) but I want to ask for some advice from you .
I recently (3days ago) ordered 6 gtx 1070 ftw gaming acx 3.0; I dont know what memory would they have but I think and hope that I'll get around 30 MH/s on Ethereum mining.
This would be it:

gpu -gtx 1070 ftw gaming acx 3.0
psu -corsair hx1050
mobo -asus prime z270-a
ram -4gb 2400 ddr4
cpu -intel celeron g3900

I looked up on some profit calculators and it seems like eth is the one to go for with my gpu. Am I right? 
Electricity is 0.14$ where I live, so I think it's a good profit.

I want to ask you guys, an I going to get the investment money back? It might be a stupid question, I know. I presume it would take somewhere around 4 months. Am I right?
Also, on my own PC I have a Asus Maximus VI Hero. It has enough PCIe slots for another 6 gpus. I am wondering if I could run some more gpus on that as well, if I manage to get my investment money back.
Sorry for my bad grammar! 
I will try to reply as fast as possible for you guys! Thanks !