Question What can be the issue?

Jun 22, 2020
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I have bought a B450 AORUS ELITE motherboard, RTX 2070, AMD RYZEN 3600, 32 GB RAM, 1TB HDD, 250 GB SSD, POWER SUPPLY 550W,
I was building my pc, I plugged everything up without the RTX 2070 and it worked well, but when I plugged the RTX 2070, the headset, mouse, GPÜ and the keyboard are not working anymore, please this is a serious problem, what can be the cause of the issue. And I still have the warranty so can it help?
 
I have bought a B450 AORUS ELITE motherboard, RTX 2070, AMD RYZEN 3600, 32 GB RAM, 1TB HDD, 250 GB SSD, POWER SUPPLY 550W,
I was building my pc, I plugged everything up without the RTX 2070 and it worked well, but when I plugged the RTX 2070, the headset, mouse, GPÜ and the keyboard are not working anymore, please this is a serious problem, what can be the cause of the issue. And I still have the warranty so can it help?
make/model of that 550W psu,please?