Question [Help] PSU won't let my system POST

thansen971

Prominent
Oct 5, 2017
12
0
510
Hello Everyone!

So I recently finished a new system. Part List Here - I am having some issues with my PSU. Originally, I had the Seagate Focus+ Gold Fully Modular PSU in my system, and it wouldn't even boot. I swapped to my older SeaSonic - G 550 W 80+ Gold Certified Semi-Modular ATX Power Supply, and everything worked fine. I thought perhaps it was just a dead PSU, so I went out and bought a new RM750x from corsair, again, fully-modular and this time it powered on for a second, but would not post. I don't have enough experience in the PSU world to know why a semi-modular PSU works perfectly fine, but a fully-modular PSU refuses to work. I'm sure it is something small i'm just overlooking because the chances of two bad PSU's seems very low.

Any help would be greatly appreciated. Thank you!