You should be able to plug the 4 pin into the 4 pins nearest the CPU (shouldn't fit in any other way) but an adapter would be better.
edit, what motherboard did you end up with? Because looking at the 870A-G54 there is only a 4-pin CPU connector.
edit, what motherboard did you end up with? Because looking at the 870A-G54 there is only a 4-pin CPU connector.


![[Image: 22173.png]](http://internetometer.com/image/22173.png)
![[Image: 1324033725.png]](http://speedtest.net/result/1324033725.png)