How high can i oc the fsb?

I have a MSI Turbo-r and a tbird 800 @980 (7 x 140).

Before i unlock the l1 i was at 8x110. I couldnt overclock more because my pci wouldnt boot. Is this the same with the 133 fsb? i can overclock 10 more Mhz before the pci will stop responding again? I read here people having 150 fsb. How this can be possible???

Palpatine
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  1. it's a ratio thing.

    If your PCI device is to blame, but will take 110FSB then it will tolerate a 10% variance on the PCI bus. Therefore you _should_ be able to go 10% on 133FSB giving you a max of 146Mhz or so. At this speed, depending on your components, it will _probably_ be a race to see what gives first - your PCI card, your memory or the cpu itself.

    Are you going to unlock the cpu and reduce the multiplier? You might not get the 800 up at 1064Mhz easily...

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  2. Oh yeah - how is it possible to get 150FSB?

    High quality RAM, good chipsets, minimal tolerant PCI cards and Video card good cooling and voltage increases on memory and cpu.

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  3. "High quality RAM, good chipsets, minimal tolerant PCI cards and Video card good cooling and voltage increases on memory and cpu."

    Don't forget lady luck :)
  4. Oh yeah - you need her too!

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  5. on my msi k7t 266 pro (ddr via chipset) i am running a fsb of 160. i was able to do this for a couple of reasons: good mem. (crucial pc-2100), the chipset has a pci dividers up to 1/7, and watercooling the chip with a tec :-).


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    Chris
    ws6@kc.rr.com
  6. a 1/7 PCI divider? Cool - does it handle the memory ratio too, or does that stay linear with the FSB? If you could reduce the RAM/FSB ratio that's be real handy. Oh - actually you're using the VIA DDR I see - can you change multipliers on that board? I believe you still cannot easily with the AMD760 boards - were abit/via nice and retained multiplier modification?

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  7. abit/via??????? It is a MSI (microstar) mb. but you can address the fsb and mem seprately. i will be posting benches on the same system that i did with a 800 duron oced to 1008 and a tbird c 1.2 oc'ed to 1445. you can set the chip to run at 100 or 133 fsb and same with the mem. crucial pc-2100 ddr though is stable at 163 fsb at cas 2.5 (i have used 4 diffrent sticks at this speed and it works fine). the multiplier options in the bios and works fine. on msi amd mb (the k7 master) you can also change the mulit just as easy. i have both mb in use at home. the only jumper on the k7t 266 pro (via ddr) that i can think of is for clearing the cmos. on the k7 master there is a jumper for clearing the cmos, clearing the fsb/multi (so you don't have to clear the whole cmos if you mess up ocing), and for the sound. if you want to see pics of my watercooler setup go to http://216.63.9.26/watercool (warning the pics are around 600k each right now). the info on the pci dividers is on www.viahardware.com and www.msihardware.com btw.

    thanks,

    -----------
    Chris
    ws6@kc.rr.com
  8. sorry - my bad - I think I was on drugs at that point, or it may have been lack of sleep from my 4 month old daugther!!!

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