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Thread: XP1900 overclocking questions




  1. #1
    Join Date
    Dec 2002
    Posts
    13

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    Hi All,

    I am interested in overclocking my system but have a few questions. Firstly my system is:

    XP1900 Processor
    G7VAXP KT400 Raid Motherboard
    256MB 3200 Memory
    Geforce 3 Graphics Card
    Audigy Sound Card

    I am not interested in increasing the CPU speed due to reluctance but I do want to set my FSB to 166(333)Mhz so I can run my memory at the designed 400Mhz. So, to achieve this higher FSB would I have to unlock my CPU or can the CPU cope with this if I turn down the multiplier to keep the current CPU speed? Also, if achieved, by only increasing the FSB and memory speeds but keeping the same CPU speed, will I see much of a performance difference? Lastly, if achieved, would my CPU temp increase even though it's overall speed wouldn't be increased, just it's FSB?

    I hope someone can help

  2. #2
    Join Date
    Oct 2002
    Posts
    55

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    ok for one your fsb and cpu are one the way to look at it is muliplyer x fsb = cpu speed so your chip runs at 1600mhz
    thats 133x12 now to get 333fsb its 166 as 166x2 is 333
    now raising the fsb without lowering the multiplyer would be
    166x12=1992 i think your computer would crash at that speed
    you have to lower the multiplyer and for your mother board you have to do it with dip swiches on the board itself not in the bioes pluse you have to unlock the chip first hope this helps
    A7N8X no delx
    AMD 2400xp@2500mhz 200z12.5
    epox EP-8RDA
    AMD 1700xp@2406mhz 200x12
    ATI 9700pro
    2-256 pc 2700 2.5 sucks need $$ for new ram
    WD 80gb SE hard drive 8cach buffer lol it died running maxto 40gb ata 133 now
    3d mark 2001se 17k
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  3. #3
    Join Date
    Dec 2002
    Posts
    13

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    Thanks for that stilllife,

    So the only way I will get my memory running at 400 is to increase the fsb to 166(333), and to do this I need to unlock it? If I unlock the processor and increase the fsb but lower the multiplier to maintain 1600mhz, would the cpu temperature remain the same? (as although at a higher fsb, it is still 1600mhz)

    Basically, I am reluctant to overclock the cpu because of the temperature increases it will cause but I do want to run my memory at maximum.

    Thanks,

  4. #4
    Join Date
    Oct 2002
    Posts
    55

    Default

    well you can get 333mhz or 400 mhz ram and set the ram to that but with your fsb at 133 its like a bottleneck in the performence
    and if you keep your cpu to 1600mhz the temp does not chang that much just keep a eye on it for the first day to see max temp,s and i think just rememberd the kt-400 unlocks xp chips try it it did for my old kt-400 but that was a soyo dragon plat
    well good luck let me know how it goes
    A7N8X no delx
    AMD 2400xp@2500mhz 200z12.5
    epox EP-8RDA
    AMD 1700xp@2406mhz 200x12
    ATI 9700pro
    2-256 pc 2700 2.5 sucks need $$ for new ram
    WD 80gb SE hard drive 8cach buffer lol it died running maxto 40gb ata 133 now
    3d mark 2001se 17k
    http://service.futuremark.com/compare?2k1=5633214

  5. #5
    Join Date
    Dec 2002
    Posts
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    Default

    I'll definately let you know how it goes. I have just one last thing to ask (as you can tell, I am worried about burning out components and ruining an investment). If, what you remember is correct, my processor may be unlocked due to the KT400 motherboard and thus I should be able to up the fsb to 166 without modifying the cpu. However, if my KT400 doesn't do that and I up the fsb to 166 and it doesn't work, will I just require a bios reset or can I damage the CPU permenantly?

  6. #6
    Join Date
    Oct 2002
    Posts
    55

    Default

    everytime i go to much my computer wont boot just rty fist to restart hit delete and chang bios if not clear bioes all set
    and see if you bios has a agp and pci lock
    you want to keep agp around 66mhz and pci 33
    on some motherboards it called pci divider will let you set like 2-3-4-5-6 sorry kt-400 does not have a 6 the more you raise the fspb check the divider to keep agp and pci down ok
    A7N8X no delx
    AMD 2400xp@2500mhz 200z12.5
    epox EP-8RDA
    AMD 1700xp@2406mhz 200x12
    ATI 9700pro
    2-256 pc 2700 2.5 sucks need $$ for new ram
    WD 80gb SE hard drive 8cach buffer lol it died running maxto 40gb ata 133 now
    3d mark 2001se 17k
    http://service.futuremark.com/compare?2k1=5633214

  7. #7
    Join Date
    Dec 2002
    Posts
    13

    Default

    The motherboard has jumpers to set the fsb. The next setting from 133 is 166 so I was just going to flick the jumpers whilst at the same time putting the cpu multiplier at the correct setting to keep it 1600mhz. Is this too big of a jump? and therefore is it best to up the settings incrementally via a programme like easytune 4 so I can keep an eye on the AGP and PCI?

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