I have an AMD Athlon x4 860k with a gigabyte ultra-durable f2a88x-d3h motherboard and for cooler I have a cooler master hype TX3. Under these conditions I am currently running the stock frequency of 3.7 GHz and with this cooler the temp of the CPU cores on idle is about 40 degrees Fahrenheit - max 80 degrees Fahrenheit. What would be a good overclock for this?