PSU Confusion. Can't find an answer!?

Oct 21, 2018
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My PSU only has a 2x2 12v ATX cable, as does my current MOBO. My new MOBO has a 2x2 12v AND a 2x4 12v, bit the manual doesn't say to use either, or, or both. I'm not going to be overclocking.

My specs will be Gigabyte Z390 Gaming X, Intel Core i7-8700, GTX 1050ti and 32GB DDR4 RAM.

Can I use just the 2x2 slot?
 
Dec 28, 2018
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I also have this motherboard and my PSU only has the 8-pin. I know you suggested using both the 8 and 4 but is it absolutely necessary? If so, can I buy a cable to hook to the back of my PSU (it has open spots to plug in 4x4 CPU cables). I have looked around for them but all i can ever find are just extensions for 8 pin (male to female instead of female to female)