PC Won’t Boot with 4 RAM sticks

[shucklefan1]

So I just got my z390 Aorus elite mobo , and I have my 4 Samsung 8gb ram sticks . The B1 and A1 spots aren’t working . Only the other 2 (with the same colors ) . Also just got my 9700k intel cpu. I heard bent pins cause this or a bad mobo , or even the ram sticks don’t work on my mobo - but they do and only in the b2 and A2 dimm slots .

Can anyone help me ?

Specs

Gtx 1080
16gb ram
i7 9700k
z390 aorus mobo

 

[Calvin7]

Memory modules sold as singles have no guarantee to be compatible in any other combinations with any other modules. This applies to identical, exact make, same thing, same color.

 

[shucklefan1]

Memory modules sold as singles have no guarantee to be compatible in any other combinations with any other modules. This applies to identical, exact make, same thing, same color.

They’re the same . Though all of them as SS single sided . Does that make a difference ?