I have two EPS connectors on my motherboard one 8 pin and one 4 pin. I own an EVGA Cable Kit which doesn't allow me to split the cable headers on the CPU cables - they are both 8 pin. Can I plug one 8 pin into the 4 pin with the remaining 4 pins hanging off or is this not advised?

Clausewitz
I have two EPS connectors on my motherboard one 8 pin and one 4 pin. I own an EVGA Cable Kit which doesn't allow me to split the cable headers on the CPU cables - they are both 8 pin. Can I plug one 8 pin into the 4 pin with the remaining 4 pins hanging off or is this not advised?

Yeah..You can plug an 8-pin CPU power connector from your PSU into a mobo 4-pin CPU power socket and leave the other 4-pin part hanging out, if there's room to do that and nothing obstructs the 8-pin from being plugged in..It will fit and work fine..The positive/negative power and ground pinout is the same..Only 1/2 of the 8-pin connector will be keyed to fit properly in a 4-pin CPU power socket..Been there, done that..Not an issue.

EVGATech_JaesonW
Like bob16314 said, plugging in half the 8 pin connector should be just fine if it will physically do so on your motherboard. Also check your manual, usually you only need the extra 4 pin if you're overclocking or using certain top end CPUs, you might not even need it. 

It's an ASUS Z590-E STRIX and it does say you can use either the single 8 pin or both. It doesn't specify the reasons why but many people have stated it's for extreme overclocking - like you said. 

I did some searching and buildzoid stated the second 4-pin is pointless because a single 8pin EPS is rated for 480w? 

Here is the video - I started it at that point: https://youtu.be/SPQZUayYbBM?t=290

It seems strange that they would include the extra connectors. I understand it might be for LN2 but if you're going to use LN2 I doubt you'd purchase that board.

Further, some people have said the second connector adds stability but I'm not sure how. Any further input would be appreciated.