[SOLVED] PC not booting after installing new GPU

Dec 11, 2019
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Hello,

i just installed a sapphire RX580 pulse in my system and now it wont boot.. when i turn it on all the fans in the entire system starts spinning and the rgb lighting works fine too. then my keyboard and mouse flicker for a second and my screen goes to black. (edit) i allready tried it in a system with a 3200G and a 400W psu and it works just fine there.

my specs:
Corsair CX450 psu
Gigabyte B450 aorus elite
ryzen 5 3400G
RX 580 8GB sapphire pulse
3x 4GB Gskill ripjaws 2666
240 gb ssd
500gb laptop hdd
asus Wlan pci card

i allready tried turning off the GPU on the 3400G but this also doesnt work. and the shop where i bought the pc said that my psu must be able to run this setup.

hope some one here can help me out.