Thank you for the suggestion, Dell care recommended the same so I ran both the normal and advanced test and both were clear of faults. It was recommended that I update the RTX3090 driver direct from Nvidia too but unfortunately the computer no longer boots correctly and just has a black screen so it’s not possible. I’ve not been able to get through to Dell Technical support team for the last 5 days now as it is still dropping my calls. I think I’m at the point now that my PC needs to be replaced as I’m beyond my level of expertise or will do so much more given the fact it’s only one month old. Update = After completing troubleshooting, a DELL-Cares agent setup a "like for like" system exchange.
Hi  My new R13 less than a month old (i9, 64Gb DDR5, RTX3090) is repeatedly showing a black screen and rebooting, at the moment the best I get is about 10mins out of it. The BIOS is latest version, all drivers are up to date, I’ve also done a full clean install of Windows 11. But the frequency of the black screens and reboots are even worse now so much so that I can’t perform anything. I’ve tried the technical support department every evening for the last three days and each time I enter my service tag # it tells me there is a “technical problem” and disconnects me from the call. I’m a little frustrated at this point and I’m not a computer guy so don’t want to mess around in the bios Any help greatly appreciated 
Aurora R13, repeated black screens and reboots