Try this guys.
How to overclock the Ph II's, quick and dirty guide:
On our board (790FX GD70), the first two voltage options should not go over the stock voltage for your chip and NB. For a C2 965 this would be 1.425 for the CPU and 1.3125 for the CPU-NB (the first two options). The second two (#3 & 4) are for adjusting above stock voltages. So if we say increase the CPU volts to 1.475, set the first to 1.425 (965 C2 chip), the second can stay on auto (not o/c'ing the NB in this example), the third to 1.475 and the forth to auto. Got it? If we say increase the CPU-NB volts to 1.35, then the first is auto, second 1.3125, third auto, and forth 1.35. Make sense?
Temps should never go over 62c (ultimately keep them under 55c under full load), CPU volts shouldn't go over 1.55v, CPU-NB 1.55v, and NB core 1.42v~. Temps can limit an overclock, as well as how many volts you can increase to.
When running a RAID array (any), or multiple disks, the SB volts like to be around 1.25v. Running multiple gpu's? Try increasing the NB PCI-e volts to 1.25-1.3v. Ram stable, but feels weak? Try adding in some CPU DDR PHY volts (Mastiffman taught us this one).
Isolate the components and test them individually. Start by lowering everything to stock, and run your RAM @ 1066 8-8-8-24 (underclocked). Unlock your cores (if a x2 or x3 you're unlocking), raise your CPU volts two 'clicks' (only if unlocking cores, otherwise leave on auto) and then run IntelBurn high pass for 20 runs (takes about 20mins). If it passes that, then you are about 95% sure it's stable, good enough for now.
Raise the speed a little, stress test it, if it fails, raise the volts 2 'clicks/notches', and stress test again. Repeat. Once you have the high clock for the CPU, go to the RAM, and work on that. Lower the CPU back to stock (unlocked) @ your stable voltages, etc... and work the RAM to where you want to go.
The best way I have found was to leave the timings on auto and work the speed (Mhz) up. Once you find the high clock for the RAM, then start lowering the timings slowly. Lower the timings by taking (for example) 8-8-8-24 down to 7-8-8-24, test, then 7-8-7-24, test, then 7-7-7-24, test, then 7-7-7-21. While testing you can do a quick IntelBurn, you can run 10 passes of it until you get to the high clock/low timings for it, then be sure to run 20 passes (I've had it pass 10, but fail 20, not yet stable).
After that, work on the NB in the same way as the CPU. The NB will add a lot of performance to the system and will greatly increase the Memory speeds and latencies. Clock it and test it as you did with the other components.
Once you know your high clocks for the CPU, RAM and NB, then you can set those settings and try running IntelBurn for 20 runs on high settings. The components may need some tweaking with voltages, etc... to all run together at their high clocks, but you should be pretty close with it at this point.
Pay special attention to the RAM when doing your overall system clock, it is usually the point of instability in a lot of systems that should otherwise be stable. Lower RAM speeds and tighter timings can work well for the AMD platforms.
Once you have the system passing IntelBurn high for 20 passes, then go ahead and run an overnight Prime95 Blend test. If this passes, then you are stable, and should be able to run anything you want at the set clocks.
Good luck, and be sure to stress test along the way, and then when you set all clocks, this last one is the most important.
Edited by mduclow - 12/25/09 at 7:47am