As listed above the specs of my build are the following:
RTX 3090 FE gpu
Ryzen 7 5800x
32Gb 3200Mhz (4x8) Kingston Fury RAM
B450 Gaming Pro Carbon AC
1Kw MSI MPG Psu
This problem started occuring when i upgraded my gpu from a GTX 1080 ti to the 3090: the PC kept shutting down when in max...