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 Post subject: Soyo SY-KT880 Dragon 2, seeking advice
PostPosted: Tue Mar 08, 2005 4:50 pm 
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Joined: Tue Mar 08, 2005 4:41 pm
Posts: 34
First time OC-er, nervous, bought this board for OC options, ease. But, before I overheat my XP 3200+, I'd like advice about whether to start with FSB or CPU ratio.
Also, I have BIOS options for PCI divider, but they are only integers: /3 /4 /5 or /6. Since I can step the FSB in 1MHz increments, that means there are many mathematically possible situations that will give non-integer ratios, right? Is that a problem?


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 Post subject: impossible, isn't it?
PostPosted: Tue Mar 08, 2005 7:37 pm 
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der, I forgot what I read a long time ago (in MaxPC, I think): I'm pretty sure that this is the end of the line, because any more speed out of this proc makes it impossible to make AGP/PCI timings match. I'd love to be wrong about this, but it hasn't happened yet :lol:
Anyway, I tried changing the CPU multiplier, and Windows wasn't having it. I might try core voltage, but probably not. I'll just wait for a dual-core Intel, 'cuz AMD annoys with their bait-and-switch routine on 940 buyers. I don't want to get burned that way.
So, if I've asked how to do the impossible, this thread may as well be killed.


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 Post subject:
PostPosted: Tue Mar 08, 2005 8:10 pm 
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S939 looks very promising. Considering they have a pretty good entourage of CPUs on S939, I'd say that's a pretty safe bet.


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 Post subject: so, is it impossible?
PostPosted: Tue Mar 08, 2005 8:33 pm 
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Kybo_Ren, you seem pretty knowledgeable from the posts I've read while trolling for the answer to my question...
So, if you see this thread again, please tell me: is it correct that a Barton 3200+ really cannot be OC'd past 2.2GHz, its rated frequency? With any Athlon, the multiplier won't go any higher than the top speed for the fastest Athlon XP, right?
:cry:


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 Post subject:
PostPosted: Tue Mar 08, 2005 8:45 pm 
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The XP 3200+ is a very very poor overclocker. It's pretty much at the max of the XP series. Sorry, but you aren't going to get much out of it.

If the multiplier is unlocked, it should go much higher that than the fastest Athlon's multiplier. But really the only thing that matters for your CPU is its operating speed. Whether you up it by upping the FSB or the multiplier, you'll still hit a ceiling.

If you are going to OC the Athlon XP though, up it by upping the FSB. You'll get better performance.


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 Post subject: but that throws the AGP/PCI clock
PostPosted: Tue Mar 08, 2005 8:55 pm 
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Joined: Tue Mar 08, 2005 4:41 pm
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Why is the increasing the FSB better for performance? My AGP/PCI clock is linked to the FSB, and I can only choose among ratios of 3, 4, 5 or 6. So when I increase the FSB past 400, I get PCI speeds above 33Mhz, so that isn't an option. Increasing the core voltage would of course increase current, and thus have the most dramatic impact on temperature, I'd guess. But, what can you tell me about the physics of the multiplier? My BIOS gives me the option of increasing that to 12, where 11 gives the 2.2G rated frequency, so I'd like to push it to 2.4...


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 Post subject:
PostPosted: Tue Mar 08, 2005 9:00 pm 
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Well, if your peripherals can't handle it, then don't. I just like increasing the FSB because it also increases RAM bandwidth. You can also change your RAM dividers to do this, but you lose the extra performance from running in a 1:1 ratio. And of course, if any part in your system can't take it, don't OC it that much.


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 Post subject: btw
PostPosted: Tue Mar 08, 2005 9:01 pm 
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Joined: Tue Mar 08, 2005 4:41 pm
Posts: 34
Asus seems to be the hardware tweakers' Messiah brand. Do you condone my plan to use that brand in the future, whether for AMD or Intel CPU?


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 Post subject:
PostPosted: Tue Mar 08, 2005 9:02 pm 
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Asus seems alright, but I've had great experience with Abit and DFI.


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 Post subject: last question
PostPosted: Tue Mar 08, 2005 9:19 pm 
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Joined: Tue Mar 08, 2005 4:41 pm
Posts: 34
does the PCI clock have to be at exactly 33MHz? If not, I'd give a try to tinkering with the FSB, but my ATI AIW claims that the sound card clock stability needs to be 0.2% or less for TV and DVD. And that is the main reason I'm hesitant to move the FSB to a value that would take the PCI clock above 33.
Thanks a million for your replies, Kybo_Ren!


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