PC won't post due to DRAM light

[D1zzyRain]

My friends and I were building his AM5 rig, and we installed everything right, but the PC wouldn't post, no fans, no lights, nothing, so we swapped the motherboard. After getting a post. My friends play Cyberpunk for about 15 minutes. Temps were fine during the gaming and before it.  The PC crashes, and the PC won't post. When it turns back the DRAM light is on, so we go buy new RAM that doesn't work same post code. No XMP. We also reset the CMOS. After that, we buy a new motherboard after returning the last one, just to get the same post code. I think it's CPU, but what could've killed it?

 

Specs-

CPU: R5 7600

CPU Cooler: Deepcool Ak400

MOBO: Tuf b650

GPU: FE 3080

PSU: Seasonic 850w

RAM: Corsair vengeance rgb ram 6000 m/ts CL36

[Likwid]

I had a problem with dram light for first couple of bood tries, had to remove GPU for ram training, after getting in windows once I reinstalled GPU and no longer have any problems. I have cl30 6000MHz gskill ram