cpu led red

Hey, i wanted to build a new pc for myself after my current one ist getting old. i bought all items compatible to the specs from the motherboard and all of it
case: CORSAIR iCUE LINK 3500X RGB Mid-Tower
Motherboard: ASRock B650 Steel Legend WiFi
CPU: AMD Ryzen 7 7800X3D
Ram: Kingston FURY Beast Wei? RGB EXPO 64GB 6000MT/s DDR5 CL30 Kit 2 - KF560C30BWEAK2-64
PSU: Corsair RM1000x Shift
GPU: 20GB ASRock Radeon RX 7900 XT Phantom Gaming White OC Aktiv PCIe 4.0 x16
2x 2TB Samsung 990 PRO M.2 PCIe 4.0 3D-NAND TLC (MZ-V9P2T0BW)
i tried already everthing i could find on the internet, i tried without the gpu, just 1 ram. i tried the gpu on my old pc it is working. i tried the psu on my old pc it is working. but in the new build the cpu led is red and i cant find any solutions to fix it. does anybody know a possible way to fix it or is the mainboard and cpu broken and i need to send them back?

Xaltar wrote: Make sure you have the correct CPU 8pin power connected to the board, the PCIe 8pin can sometimes be forced into the connector with some PSUs. Double check to make sure the 8pin CPU power is properly seated.

i checked it all over right away. the 2 cpu power cabel are on the top left of the motherboard connected and on the psu on the recht buttom where its written. all the other pcie are on the other slots