Question PC Won't boot unless underclocked and undervolted

[cameronPC1]

I've been having problems since day 1 of building my PC. It started with the monitor being 'out of range' unless I used another monitor to setup the PC (even though both monitors are the same resolution). Eventually I managed to install windows, ran fine for about an hour until it started rebooting, with increasing frequency until it was just boot looping. I found a forum post online with a similar problem, and he solved it by underclocking the cpu from 3.6->3GHz, and manually overriding the cpu voltage, from around 1.4V to 1.3V. He also recommended to disable C-state control although I am not sure this makes a difference. This worked, and over time I gradually increased the clock back to standard speed, and it would work for a while (maybe a week or so) before it would start boot looping again, and I would have to underclock it again to get it to work. However, even when underclocked I have had problems with rebooting/crashing, and I have had to reinstall windows 4 times now, as sometimes when it crashes it doesnt let me load into windows and I have to do a fresh reinstall. I have also had to run the sfc/scannow and chkdsk function probably over 5 times now to sort corrupted files, which I'm sure is not normal considering I built the PC start of May this year. A week or so ago I tried increasing the clock just to 3.2GHz not even to its standard clock, and it started bootlooping, and even when I underclocked it, it wouldn't fix the problem. I took it to a PC repair shop and he told me that he tested the RAM and the power supply and that they both appear fine, I have replaced the motherboard twice, the first time with the same model, and just the other day I bought a different model to see if that would change anything, as the PC repair guy told me it was most likely a motherboard issue. After trying this third motherboard, I had the same problem, and only way I could fix it was by wiping the whole drive and reinstalling windows again. The PC is now booting, but only when underclocked to 3GHz. Worth mentioning that I have updated graphics drivers, and have tried updating the AMD chipset drivers, and I have also tried updating the BIOS. As you can imagine, this is extremely frustrating and I am really stumped as to what the problem could be. Any help would be much appreciated, thanks.
Specs:
AMD Ryzen 5 3600
Radeon RX 580
Corsair VS Series VS550 550W
Corsair Vengeance LPX (2x8GB) RAM
Western Digital Blue 500GB SSD
Original motherboard :
MSI B450M-A PRO MAX
New motherboard:
MSI B450M PRO-M2 MAX

 

[Lutfij]

Word of advice, use spaces in between a wall of text for people to comprehend your post.

That being said, it seems to me you might have a number of problems. Undervolting not only means that you're asking less power draw by the PSU but in effect asking less from the PSU. You actually don't have the right wattage for the build. Should've been more like a 650W unit. Speaking of unit, what version of the VS do you have? Is it the grey label unit or the orange label unit?

I'm leaning towards a faulty/inadequate PSU, a faulty motherboard with BIOS issues and/or a corrupt OS. Where did you source the installer for the OS?

 

[cameronPC1]

Word of advice, use spaces in between a wall of text for people to comprehend your post.

That being said, it seems to me you might have a number of problems. Undervolting not only means that you're asking less power draw by the PSU but in effect asking less from the PSU. You actually don't have the right wattage for the build. Should've been more like a 650W unit. Speaking of unit, what version of the VS do you have? Is it the grey label unit or the orange label unit?

I'm leaning towards a faulty/inadequate PSU, a faulty motherboard with BIOS issues and/or a corrupt OS. Where did you source the installer for the OS?

Thanks for the reply, and sorry about the formatting.
With regards to the wattage for the build, how are you getting the 650W figure? As I used the pcpartpicker calculator when I was choosing my PSU, and that suggested that my PSU was adequate. I also just checked newegg PSU calculator, and that recommended a PSU of 461W. (Image shown below)

https://imgur.com/a/38nRLBj

View: https://imgur.com/a/38nRLBj


And with regards to the motherboard, it seems very unlikely that I would receive 3 faulty motherboards in a row, and I have tried standard BIOS settings, resetting the CMOS, and updating them, and the only thing that works is underclocking. And I sourced the OS from the windows website (the ISO tool).
Thanks again