XP1700 at 166 overclocking questions

[KingofFah]

I want to know whether an XP1700 will run fine at 166 FSB. The board has a 1/5 divider so PCI bus is not a problem. Without unlocking, just changing the FSB in BIOS, will the CPU run stable? If I should raise my voltage, what should it be?

 

[DeRusto]

I don't know if your processor will be able to go that much higher without changing the multiplier.

But, as long as we are on the subject. I was running my 1.4 tbird on a 166fsb but I dropped the multiplier down to keep the speed at approx. 1400mhz.

Well, it ran fine, and was a little bit faster but anytime that I would turn the machine off, when i turned it back on, the fsb would revert back to 133 but the multiplier would stay at 8.5(or whatever i had it on)..

I was just wondering if anyone knew why it did this.

 

[FatMan42]

If it's a relatively recent chip then the chances are - yes - it probably will work at 166fsb (i.e. 11*166=1830). Check the stepping revision. If it's AGOGA, AGOIA or AROIA then you're quite likely to have a successful overclock. The voltage you'll use will be the minimum required for stability. Some 1700+ will run at 1830MHz at stock (1.75v) voltage. My own (week 11 AROIA "Y") requires 2.0v to attain stability at that speed. If the system is unstable (i.e. won't run Prime95 all day long, looped without crashing) at a particular voltage, raise it by the minimum. Test again raising the voltage one notch at a time all the while.

Just make sure your PSU and cooler are up to the task, 'cos the heat coming off is going to be significantly increased. Unlocking would be a good idea - you can better use that 1/5 divider to get a perfectly stable system. Even if 11*166 isn't attainable you should be able to get some overclock out of the chip.

DeRusto: I suggest you ask the same question over at this forum.

 

[DeRusto]

Why, thank you.