Motherboard and psu? have you tested some different GPU too that has same level of power draw?
Even i hear noises from GPU sometimes when UE5 under heavy strain, but not a single reset with any 3D stuff, from games to Unreal itself. Most of my crashes with unreal is when GPU memory fills up and thats why i plan to get bigger memory mid range Nv or RX GPU next year if i find normal price… i do not care which, Nvidia or AMD, UE5 stability is only thing that matters(of course GPU manufacturers are different too and produce different quality components in certain areas).