Need help overclocking system!

[AtomicDude512]

I have a XP 1700 Palomino which I got to 145MHz somewhat stable. I think a voltage boost to 1.8v should do it. But at the 145FSB what will my AGP/PCI Speeds be?

Thanks!

 

[calvink]

It depends on your motherboard, but i'm assuming that you'll probably have a 1/4 divider. so the speed of your agp/pci speeds will be at 36.25Mhz.

 

[AtomicDude512]

I have a KT333 Ultra based motherboard. Whats the formula so I can work out the frequencies for myself please?

 

[AtomicDude512]

And because my AGP bus is supposed to be at 66Mhz (I think) that means it is worsening AGP performance...🙁

 

[RoukedeJong]

Hiya

well, most of the time a slight increase of the agp-bus is not really a problem, even better! Because of the higher speed, the bandwidth of the bus is increased too. Anyways, if you get problems with it try to disable things like fast-writes etc, should stabilize it.

About your fsb, well, several options are available, depending on your motherboards features, but the standard proportions are for example : 133 fsb (is 266 ddr for the cpu); 66 agp; 33 pci; 8 isa 🙂
Normally these dividers Calvink is speaking of are kinda locked, but the nifty thing is, when you up the fsb from, let's say a stock 100 MHz to a stock 133 MHz, other dividers come into play, at a fsb of 100, the agp is 2/3, pci 1/3, at 133 agp is 1/2, pci is 1/4. Anyhow, I'm running my fsb at 171 on a kt133a, so my agp is 85.5 MHz and my pci is 43, not that teh harddisk likes it, but it doesn't hurt that much. So, those are the figures to work with, good luck,

Rouke

 

[BigJ]

Originally posted by: RoukedeJong
Hiya

well, most of the time a slight increase of the agp-bus is not really a problem, even better! Because of the higher speed, the bandwidth of the bus is increased too. Anyways, if you get problems with it try to disable things like fast-writes etc, should stabilize it.

About your fsb, well, several options are available, depending on your motherboards features, but the standard proportions are for example : 133 fsb (is 266 ddr for the cpu); 66 agp; 33 pci; 8 isa 🙂
Normally these dividers Calvink is speaking of are kinda locked, but the nifty thing is, when you up the fsb from, let's say a stock 100 MHz to a stock 133 MHz, other dividers come into play, at a fsb of 100, the agp is 2/3, pci 1/3, at 133 agp is 1/2, pci is 1/4. Anyhow, I'm running my fsb at 171 on a kt133a, so my agp is 85.5 MHz and my pci is 43, not that teh harddisk likes it, but it doesn't hurt that much. So, those are the figures to work with, good luck,

Rouke

How long has your harddrive been surviving on that high of a PCI bus? Not too much longer I'm guessing either 😉. Atomic, try turning your FSB up to 166mhz so that the 1/5 divider comes in so you're running your AGP and PCI frequencies at 66mhz and 33mhz respectively. If its not stable, increase the Vcore a tad.