The monitor doesn't recognize the PC signal

I made a PC for the first time, but the monitor doesn't recognize the signal whether it's hdmi or dp. The cable is connected to the GPU,

Mother: gigabyte gaming b550 x v2

CPU: ryzen7 5700x

GPU: RTX5060

RAM: Corsair vengeance lpx ddr4

cpu cooler: NZXT kraken core 240 rgb

psu: 750w gold