the weak link in your system for overclocking is your ram and the four stick configuration
your auto config has them Identified incorrectly as PC6400 when in actuallity they are PC2-8500 sticks which are designed to run at 5-5-5-16 with voltages of only 1.8volts
Kingston IMHO was never much more than a value ram manufacturer, they played a major role and filled a much needed niche back in the day when memory prices were insane.
well; prices are no longer insane and high performance sticks can be bought very reasonably now days
I personally suggest you get a matched pair of one gig each stick (NOT four sticks!) of Corsair or Crucial PC2-8500 sticks with CAS latencies of 5-5-5-15 and capable of being volted to 2.1 or 2.2 volts then you will not have a choke point at the memory
you could sell off your existing sticks on ebay >>>>> just a thought
but I would manually back off your timings to 5-5-5-15 if you want stability back in your system and you cant raise the voltage with those sticks, I am amazed you got this far.
I have never seen four sticks run in an overclocked system without ramping up the voltage a tad!
enjoy, and nice clock
