My PC restarting with the below error Message

It looks like cpu is not getting enough voltage so under load its giving you errors.

Have you changed anything in bios or all stock ?

I think you should first rule this out before buying a power supply.

Also your PSU is quite good with plenty of headroom... you could easily run a much more power hungry GPU.

If your settings are auto or manual try setting vcore to 1.35 and lower cpu clocks a little and run tests again.
 
It looks like cpu is not getting enough voltage so under load its giving you errors.

Have you changed anything in bios or all stock ?

I think you should first rule this out before buying a power supply.

Also your PSU is quite good with plenty of headroom... you could easily run a much more power hungry GPU.

If your settings are auto or manual try setting vcore to 1.35 and lower cpu clocks a little and run tests again.
I replaced my 5 year old Antec Earthwatts Pro 750w with Coolermaster MWE 750w PSU and the problem is gone.