New GPU has dual 8 pin slots, can I just simply use 1x 6+2 pin?

Mar 23, 2018
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So basically, my 1070 ftw have 2 slots for 8 pin, do I have to fill in both of the slots, because the only cable I have right now is a 2x 6+2 pin cable coming from one 8 pin on the PSU.

If not, should I buy 2 cables that are each 8 pins that come from a 6 pin on the PSU, or 2x 6+2 ping that comes from one single 8pin on the PSU.

Pretty confusing, sorry. Thanks!
 

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