AMD: FX-8320 GPU, MOB: ROG Crosshair formula V. OC?

The overclock procedure is the same for all FX series processors. With your FX 8320 you will be doing the same exact things as you would with the FX 8350, but your starting off with lower settings in clock speed and Vcore. Best place to start is to load into your bios, turn off all power saving features (once you have your overclock you can re-enable some of them - just follow the guide), take your Vcore from AUTO setting to MANUAL setting and then raise your multiplier from its stock 17.5 to 18 (you adjust by using the + and - keys). This will raise your system speed from 3.5 to 3.6Ghz. Load into Windows and run a stability test (Prime 95 or OCCT) for about 15 minutes, if you have no problems go back into bios and raise the multiplier to 18.5 for 3.7Ghz - test if passes raise to 19 for 3.8Ghz.... keep doing this until you get an error or system freeze running the stability test. Once you get an error reboot into bios and at that point raise your Vcore (CPU voltage) by one increment using the + key. Reboot into windows run the stability test and see if it passes, if it does you can go back and raise the multiplier again, if it doesn't you have to raise the Vcore by one increment and test again. Keep doing this procedure and you will eventually reach your "overclock wall" where your processor is getting too hot running the stability test (thermal max is 70C but most like to keep it no higher than 62C - in AMD Overdrive will display your thermal margin so will say 8C for 62C) or you will hit an overclock wall because you are at maximum voltage (for FX processors 1.55V is maximum safe voltage). Once you feel that you have your best stable overclock run Prime 95 or OCCT for at least 4 hours of stability testing, you need to be sure that under load for an extended period of time your temps are under control and you are stable. If you pass the 4 hour test your have a stable overclocked system, if you didn't then you have to either raise your Vcore by one increment or lower your multiplier back to its last setting you thought was stable and try again.

Overclocking has to be done in this way to get your best clock speed at lowest Vcore. Every time you run the stability test you need to have AMD Overdrive open in the background to monitor your systems temps (it will show you how many degrees C you have until you reach your thermal limit for the processor). Never use any software to overclock, always do your actual overclocking in bios, but AMD Overdrive is the only program that will accurately give you the true temps of your processor. Stability testing should be done with Prime 95 or OCCT stability test.

I highly recommend your first overclocks to be multiplier only overclocks as they are the easiest to do. Once you are very comfortable with multiplier only overclocking and feel like you know understand overclocking then you can try fsb overclocking where you are overclocking your NB, RAM, ect. Fsb overclocking will give you better single core performance, but is much more complex when compared to multiplier only overclocking. You need to know how to walk before you can run