Building a new pc

[Sparta12]

I am looking at building a gaming pc asap and need some guidance.

I will be purchasing;
I7 7700k 4.2ghz
Gtx 1070 gaming 8gb
I alreasy have 16gb, but i bought 3000mhz ddr4.

So im wanting to know what motherboard, case and psu i should get that is cost effective.

I get confused with the dimensions of the psus and what cases they would fit in, also woth the motherboards it seems not a lot support 3000mhz ram?

Any advice would be appreciated

 

[UCSMiami]

Unless I guru steps in I would go to Tom's Hardware and ask there.