Originally Posted by kromar
yeah never found something stable above 3.5ghz... someone just mentioned in an other thread that the CPU-NB voltage and not the NB voltage increases FSB stability so maybe that was my error all this time.
if that is true i will need to up the CPU-NB voltage when increasing the FSB and the NB freq.? and how high can i go with the CPU-NB voltage? i think it turns red at about 1.6v or so
i set the PCI clock back to 100 till i can figure out whats the problem with the FSB stability.
Basically you need to try something like this:
300x12.5 CPU Ratio = 3750Mhz or
266x14 = 3725~ or
280x13.5 = 3780~
CPU vCORE = 1.4+ depending on your chip/motherboard.
CPU-NB = 1.3+ up to but not exceeding 1.5v for anything 2400+. Stock voltage should be fine up to 2400 give/take also depending on chip/motherboard
NB voltage = Auto or default. No need to increase it.
Memory timings = Auto or loose, 2T until you can find stable CPU clocks. If you have 1600Mhz RAM, use the stock timings for 1600 at 1333 for sake of eliminating the RAM as cause of instability.
That's at least a starting point higher than 3.5, and you can adjust the FSB/CPU Ratio until you find something that works. I'm sure you already know the common ones:
286x14 = 4.004
250x14 = 3.750
290x13.5 = 3.915
279x14 = 3.906
etc etc etc - You just have to find clocks that are somewhat stable then fine tune the FBS clock until you have no more crashes. IE; if 268 is unstable, try 266, then 264 etc, until you found your limit - whatever it may be.