Posted 17 February 2010 - 12:51 PM
The FSB in and of itself doesn't limit the overclock.
Either the CPU is reaching it's limit (what is CPU voltage?), or the memory is reaching it's limit.
Adjusting the FSB/MEM ratio doesn't effect the FSB speed, vice versa it effects the memory speed for a given FSB. Get your mem divider set so the mem is running at it's lowest speed. Bump the FSB until you get problems. If the CPU is giving up at ~3.4 at stock voltage, then that is impressive. Bump your CPU voltage up a step (mind your CPU temps), and see if that helps the overclock.
Once you find a CPU speed/temp that you can live with, go back and start changing your mem divider to bump up your mem speed. The main thing when trying for an overclock is to isolate the components. Make sure your memory is slowed via the divider to take it out of the picture when finding your max CPU speed, then after you find your overclock, change dividers until you get problems and back it down a bit.
I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)
3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)