How long for Prime95 ?

I am soon to purchase a Hyper 6 hs + fan, and will then o/c a64 3200+, but have been told to raise fsb (htt) in incrememnts of 5mhz (multiplier locked). Do i need to run prime 95 everytime after each 5mhz increase to check for artifacts and if so for how long? running it over night after every increase by 5 mhz seems a bit time consuming really!?

For ramdon testing I do about an hour to two hour's test before rasing the fsb anymore. But for my final test I alway's run anywhere from 24-48 hour's of prime and then about 6 hour's or 3dmark2001 and 03.

12 hours should be fine for anything except server related work. i usually like going for 24 hours cause i can turn it on in the morning and turn it off the next morning

Find your max that boots into windows, then drop 100mhz on the cpu, or 5-10mhz on the HT and prime. Usualy 1hr is enough for basic testing.

Yuriman said:

Find your max that boots into windows, then drop 100mhz on the cpu, or 5-10mhz on the HT and prime. Usualy 1hr is enough for basic testing.

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What he said.

And after you find the highest speed that's stable for an hour, let prime run for 12-16 hours at that speed and if it pass, it's pretty stable.