Thanks for the advise. I'll look into getting a better power supply. I already tried to set my memory to +600 and was having issues. currently, I am at +350 and will keep pushing it little by little to see how far that I can take it.
I am pretty sure it's a PSU issue. When you want to buy a new PSU keep in mind that you will use it's 80% capacity. For example, an 80+ Gold rated 1000W PSU will give you 80% efficiency. In other words you will be able to utilise 800W from it.