Motherboard or Power Supply? Or Both?

Jul 21, 2018
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I moved my GPU, CPU, RAM, HDD, and SSD to a new jcomputer. I bought a new case, motherboard, psu, cpu cooler, fans, and white cables. Here's what's going wrong:

-Old power supply works on new computer
-New power supply doesn't work on old computer
-New power supply did work on new computer but now won't
-Motherboard lights up when old power supply has cord in
-Motherboard used to light up when new power supply flip was switched
-Computer turns on but then turns off instantly when power switch is pressed (both psu)

Case : Phanteks P400S
Graphics Card : Radeon RX 480
Processor : Intel i7 7600
Power Supply : EVGA 550W (new) HP 213w (old)
Motherboard : Asus Prime z370-a (new) random HP one (old)
RAM : 16gb Corsair Vengeance RGB
HDD 1TB WD
Cpu Cooler : NZXT Kraken x62
Fans : 3 SP120 ; 2 HD140

Q :
Do I need a big power supply?
Why doesn't the new power supply make it turn on?

 
Solution
Ah, that's unlucky then. What's wrong with your current CPU? Well, not much really. If I may, why did you buy a new motherboard? Aesthetics, compatibility with a case, or? Your 6700 won't work with the new board thanks to intel introducing a new chipset nearly every single bleeping generation.
Jul 21, 2018
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All cables are plugged in. I am currently using my old pc setup. I'll try running the system with only the CPU and RAM.
 
Jul 21, 2018
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Nothing happens with only CPU and RAM installed. The psu fan turn on (eco mode on) and the motherboard lights don't turn on. I even tried it with a different power supply cord and still nothing.
 
Jul 21, 2018
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It's the i7 6700* I just checked the paper. oops
 
Jul 21, 2018
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I bought the motherboard and psu on amazon on may 18, 2018. What's wrong with the cpu I have? (i7 6700)
 
Ah, that's unlucky then. What's wrong with your current CPU? Well, not much really. If I may, why did you buy a new motherboard? Aesthetics, compatibility with a case, or? Your 6700 won't work with the new board thanks to intel introducing a new chipset nearly every single bleeping generation.
 
Solution
Jul 21, 2018
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I bought the motherboard for the white accents and it said it was compatible with intel so I just assumed it was good. FeelsBadMan

Which motherboard would you suggest that I get that is compatible with my current cpu and has white accents? (preferably asus because I like their bios)