The first image doesn't seem to load properly. Anyways The main settings in your BIOS that you should work with are:
-CPU Ratio AKA Multiplier
-CPU Voltage AKA CPU VID or something similar
And maybe the Northbridge voltage but this is usually left untouched until you start reaching high, unstable clock speeds
Raising the CPU ratio and FSB will result in a higher cpu speed. Both do the trick so you can stick with one or the other or you can tweak both for a finely tuned configuration.
The FSB is linked with the DRAM Frequency AKA Memory speed (Your memory's speeds - 666.5Mhz; note when running dual channel that number is doubled hence the labeled speeds are 1333MHz because 665.5X2=1333) so if you raise the FSB your dram freq will also go up. Your memory should be able to be overclocked a good bit before it reaches instability. This is why multipliers are helpful you can overclock with the multiplier instead of the FSB so you do not put too much strain on the memory. Although the E8500 has a locked multiplier so you are going to be limited.
If you don't know this its good to know.
CPU ratio - 9.5x
FSB - 333Mhz
Multiply the two and that's how you get your CPU speed. 9.5x333=3.1Ghz
Now to start overclocking. Instead of having your CPU ratio on auto set it to it's default setting of 9.5x
So with the multiplier at 9.5x. Raise your FSB by 5-10Mhz at a time. Save the settings. Boot up into windows and use a stress test program. I would download a program called OCCT (Free) because that can detect an error really fast and saves you a lot of time.
Do this until you reach your CPU speed goal. I'd aim for a setting of 9.5x379 for an overall clock speed of 3.6GHz. I cannot be 100% sure but my instincts tell me you don't need to mess with the voltages just yet. Anything higher than 3.7Ghz then yeah you probably will start to reach instability so raising the VCore (CPU Voltage) will help.
So just raise the FSB enough to get to 3.6 or 3.8GHz in increments of 10 (i go by 15 just because i can be lazy) stress test in between.
Overclocking can be very tedious and it requires patience but can be rewarding and fun once you get the hang of it. The E8500 is a very good overclocker and most of them can reach speeds upwards of 4.2Ghz. Every CPU chip is different and overclocks vary so no one can really tell you the limits of your CPU, thats for you to know AND to find out.
Edited by damian, 29 July 2010 - 06:03 AM.