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Overclocking Athlon xp 2500+ need help, having problems

post #1 of 10
Thread Starter 
I have a athlon 2500+ xp coupled with a ad77 motherboard. My problem is that when I go into bios and overclock my cpu speed my system starts up but nothinng works properly and my system reg files screw up. This is my very first attempt at overclocking so I don't know if Im doing anything wrong or forgetting anything but any info would help.

My system stats are
ad77
2500+ athlon xp
80 gig hd
1024 meg ddr ram
x800 xl video card

Thanks
post #2 of 10
What brand motherboard is that?
Sounds like the system is simply unstable, how much are you raising the FSB when you do this because you really shouldn't be jumping any more than 5MHz or so at a time. So if you are doing more than that try 5MHz and see what happens.
As well what do your cpu temps look like?
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post #3 of 10
From what I can remember from the AthlonXP days, the 2500+ can reach 3200+ speeds simply and easily on most boards just by increasing the FSB to 200 from 166. I believe most would do this even on stock voltage and HSF. Might want to give that a shot. Try to hit 200FSB with that board. If you can...BOOM, you have a 3200+ AthlonXP! That's just what I read though, I used to have a 2600+ Barton that I could hit I think 2.53...so I don't know for sure what you can hit. If the 200FSB thing doesn't work out, then do like the guy above me said, go 5MHz or so at a time, till you're stable.
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post #4 of 10
I could get my old 2500 barton on a Gigabyte to 2.2GHz but it wasn't stable, hopefully yours will go further than that but there is no guarantee with this stuff. Good luck anyway and keep us up to date on you progess.
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post #5 of 10
What core is that CPU? A Barton? You could unlock your multies so you can push evey possible MHz out of that thing.

FAQ: http://www.overclock.net/faqs/41072-...ghlight=barton
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post #6 of 10
Well it's my priveledge to help. The reason you need to go up 5MHz (or so) at a time or so is because your cpu obviously has a limit and there is no way of knowing if that is 200 or not. You can trying shooting right up to 200 but you already know the kind of problems that brings.

What you want to do is search around for a while with google and try to find a "guide to athlon xp overclocking" that will be a lot more thorough than I have time to be. The basic gist is this though. Bump your FSB 5MHz at a time and after each bump load windows and run a programs call "Prime 95" for atleast 20 min. (search for it in google)That will give you a rough idea of how stable your system is at the speed. Continue doing that until you come to a point where the system is unstable and the test fails. From there you have the option to add some more voltage to the cpu, north bridge and or ram to see if it stabilizes or drop your FSB back a bit to a stable setting.

Make sure to monitor you temps and do your best to keep things under 50C ideally. Once you think you've found a stable setting allow Prime95 to run for 8 hours without errors and you have your max stable CPU clock.

Again search google for a guide. There is a LOT I am leaving out simply for sake of simplicity. (as game has already shown.) Good luck and keep us up to date.
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post #7 of 10
If your MB is not using the NF series chipset, there could be you problem.
With the NForce chipset, you have the ability to set the AGP/PCI to 66/33 or "Lock it" which other chipsets of the time could not do. Why does this matter, as you increase the CPU bus speed (or FSB) the PCI can and will creep up to the point of causing instability and even data corruption.
    
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post #8 of 10
For those who don't know (or didn't google it ) the AD77 is a VIA KT400A platform from DFI

I agree with The Duke sounds like there's (potential) data corruption going on there, an insufficient PSU can also create the same issues when trying to OC

Personally with early VIA offerings I go for a 10% OC and then see how things go from there, BTW this puppy will do 1Mhz increments/steppings

If you're looking to gain a bit more performance from this setup you could begin with playing with the RAM timings, is your HDD SATA or IDE?
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post #9 of 10
If he is freeky lucky, the 11x166 Barton 2500+ may like a 200MHz FSB with about 1.8v vcore, provided he has the cooling to keep the full load temps below 55c
That would keep him on standard and not peev off the PCI/AGP buss and even allow some small bumps above a 200MHz FSB!
    
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post #10 of 10
Def curruption. But curruption where?
on the disk / CPU/Ram?

It could be that the data on the HDD got mucked up, but I've noticed that this usually only happens when you're in windows.... and the FS is being uttilized more R/w) as opposed to at boot - where data is mostly only being READ.

In my humble experience, It might just be that due to the OC, the Data between RAM/CPU gets mucked. - maybe you should reset bios and try?

but ftr - I've found that these chips will depend more on a good combination of Multi/FSB.

More so than I"m hearing these newer chips do.. (where FSB really gets you a long way).
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