Question I messed up

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Jan 14, 2024
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OK, so here's what I currently have:

Ryzen 5 2600
RTX 2060
ASRock B450M
512G SSD
32G 3600 RAM
500wPSU

I wanted to upgrade a bit so I bought:

Ryzen 7 5800x3d
Radeon 6700xt
Peerless assasin 210 cooler
Corsair 750w PSU

So here's my problem. After swapping in all the new stuff, my PC just started power cycling. I put in the old CPU and it just gave me a black screen. Putting the HDMI in the mobo gave a gray screen. So I tried old cpu new gpu. Nothing. Gray screen on both. I downloaded the latest non beta bios from ASrocks site and put it on my mobo and tried the new cpu again. It gave me a screen where it detected it, but went black after I hit Y. I have no idea what's going on and would sure appreciate y'alls help.
 
Update:

Newegg issued me a full refund since I apparently bought the last of that card. I'm going to have to drop an extra $20 to get another one. I was looking at the 7600xt or the RTX 4060, but the 6700xt beats them everytime.