Question New PSU causes my PC to turn off

[MarTri6]

My PC power supply (Nzxt 750w Bronze) burned with a power cut and I got a new one (Corsair 750W 80 Plus Gold RM750e Modular) but when I instal it, my pc automatically turns off. However, the new PSU works perfectly fine in a different pc with almost the same specs as mine, only a different mother (Aorus elite v2 b450). In the meantime, in my pc I'm using my brother's power supply (Corsair 650W 80 Plus Bronze CX650) which works just fine and doesn't cause my pc to turn off. Could this possibly be caused because of something faulty in my mother, like for example a broken pin in the 3.0 header? Maybe this new power supply has more safety measures than my old one and causes it to turn off because of something faulty? As far as I found on the internet, the new PSU is compatible with all my specs.

My PC specs:
CPU: AMD Ryzen 5 3600
Motherboard: ASRock B450M-HDV R4.0 (AM4)
GPU: NVIDIA GeForce RTX 2060 SUPER

 

[boju]

Are there any modular cables, maybe pcie for graphics card or sata, remained and connecting to new psu? Using wrong cables can often cause short protections to kick in, other times the component just fries. This is because pinouts aren't always the same across different brands so it's highly advisable to replace all psu cables.

 

[MarTri6]

Are there any modular cables, maybe pcie for graphics card or sata, remained and connecting to new psu? Using wrong cables can often cause short protections to kick in, other times the component just fries. This is because pinouts aren't always the same across different brands so it's highly advisable to replace all psu cables.

No, all the cables are of the new PSU. Nothing remained of the old one.