Originally Posted by ComputerRestore
For the OP
Just to confirm: Did you turn Turbo Mode off? The way you are writing your voltages is very strange +0.75, +1.25 etc.
When you reboot after turning Turbo Mode off your normal CPU Voltages will be in the 1.275-1.35 Range for the stock speed of 3.1Ghz (1.325 Seems to be the best for Overclocking)
I can understand why you are writing +0.75, but because not all FX-8120's have the same stock VID you are better to write - increased CPU Voltage to 1.425 for 4.6Ghz etc.
As well - do not Disable settings in PC Health (Thermal Protection etc) The settings you should disable are under Advanced Settings. C1E, C6, etc. (at least until you are more familliar with OCing)
Setting DRAM speed to Auto until you are happy with your Overclock is a good idea, to rule out issues with them (incorrect Timings, Voltages etc)
As others have said, Using only the Multi to increase the CPU frequency is a good starting point. Because the FSB increases the Clock Speed of so many other components on the Motherboard, NB, HTT, PCIe, DRAM, to name a couple, if you aren't testing and adjusting the voltages for all those other components, then you will run into instability because of that.
So, yeah. Just consentrate on Multi only, until you find out what your CPU is capeble of, then you can tweak the system a bit more using other methods.
An idea of settings though would be.
Multi 22.5, FSB 200, Turbo Off, CPU Voltage 1.425-1.45