overclocking question

Discussion in 'General Hardware' started by jumpy, Sep 22, 2002.

  1. jumpy

    jumpy Guest

    hi everyone
    i've been doing some overclocking on my old celeron, see sig, and i was having some problems with getting any higher than 124Mhz fsb, i think mainly because the agp bus and pci bus speeds go too high at that fsb with a 1/3 pci multiplier? am i correct in saying that? i couldnt even get it to the bios when i set jumper to 133Mhz.

    by the way i can set jumper either 66,100,133 or auto, i want to set it to 133 so that the pci speed goes down because it will go down to 1/4 the fsb = 33Mhz i think. :confused:
    there is no place in the bios (phoenix 6.00) to change the fsb/pci ratio so i think the jumper setting is the only way.
    so what i'd like really is to have my pci and agp bus running at a normal speed but my cpu overclocked and memory at 133.
    does anyone follow me, or think i'm completely nuts....

    i want to know if that's what the jumper is doing, changing the fsb/pci ratio, if it is, any suggestions as to why it won't even make it to bios at 133?
    thanks in advance

    p.s and no i dont have any money to buy a new top of the line athlon XP. poor uni student :(
     
  2. stuy_b

    stuy_b Guest

    Ive got my motherboard jumper set to auto, it allowed better overclocking (for me at least).

    I have PC-133 memory and can get overclocked FSB to 145 and the PCI bus goes upto 36 (i think).
     
  3. XP Abuser

    XP Abuser Guest

    arrghh my brains hurting
     
  4. jumpy

    jumpy Guest

    but $tUy_B your default fsb is 133 so it makes it easier, and your pci automatically gets set at 1/4 your fsb i think.
    with my celeron it detects it as 100 fsb and therefore sets my pci to 1/3 == 33Mhz.
    which means if i go to 133 from my bios settings my pci bus goes to 44 and my agp bus to 88 which is a bit high i think, i think though if i set my fsb to 133 on my mobo it will take the pci down to 1/4 instead of 1/3, is that right?

    ....whats left of my brain is hurting too :)
     
  5. stuy_b

    stuy_b Guest

    lol.. yea. sorry..forgot you got a celery, my bad.

    does your motherboard let you change the fsb in 1Mhz steps, or to only fixed speeds like 66/100/133.

    If you can try upping the fsb with the 1mhz stepping..and see whta happens.
     
  6. jumpy

    jumpy Guest

    maybe i'm asking a bit much of my celeron that would be a 33% o/c although it should still make it to bios, it wasn't getting hot either. maybe the voltage?
     
  7. jumpy

    jumpy Guest

    umm yeah, celeron's are all good, no my motherboard doesn't do 1mhz stepping, goes 103,105,110,115,120,124,133.
    i think the 124 to 133 step is too big, shame on aopen.
     
  8. MiseryQv2.1

    MiseryQv2.1 Guest

    Not all motherboards will or let you changed the pci clock...
    It's a limitation of your motherboard... +24FSB is a good overclock...

    I'm at 152FSB on a 133mhz chip... = +19mhz...
     
  9. Sazar

    Sazar F@H - Is it in you? Staff Member Political User Folding Team

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    perhaps on some mobos

    if you oc your fsb... the pci clock automatically will increase also...

    different mobo's work it differently but it WILL increase far as I know..

    if you can keep your pci clock lower than 40 you are doing well... above 40 you start getting issues with the stability... above lik 42-45 you are guaranteed instability... also you may burn out some devices... so you don't want to push it up too high...
     
  10. MiseryQv2.1

    MiseryQv2.1 Guest

    The AGP/PCI FSB always increase when you turn up the system FSB... When you get past that 40mhz AGP then SOME boards will go to a lower AGP/PCI clock... Two of my computers are suppose to do that but have no settings for it,,, It's done automatically...
     
  11. G-Lizard86

    G-Lizard86 Guest

    i have a celeron 1.3ghz @ 1.48 ghz, (114x13.0) the multiplier is locked so the only thing to change is the fsb, i'm stuck now bcuz the pci is 38 mhz, and soundcard fails above that, i also tried the 133mhz option, but it's no use bcuz a celeron does not support 133 mhz, it just wont start up, it's a 100 mhz fsb processor, so stick to this overclock, sounds good to me!:D
     
  12. Sazar

    Sazar F@H - Is it in you? Staff Member Political User Folding Team

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    pci runs @ 33 default... agp runs @ 66 default...
     
  13. G-Lizard86

    G-Lizard86 Guest

    lol yeah.... btw, i've heard that the P4 1.5ghz is a 133 mhz fsb 370 pins processor, is that true? cuz if it is i'm throwing out my celeron immediatly...cuz my board does support the 133 mhz fsb, it's just that the celeron doesn't
     
  14. stuy_b

    stuy_b Guest

    Glizard.. myth m8!

    P4s use 478 socket
     
  15. G-Lizard86

    G-Lizard86 Guest

    like is there a processor that supports 133 mhz fsb and has a clock speed above 1.3 ghz?
     
  16. G-Lizard86

    G-Lizard86 Guest

    and p4's do not use only the 478 socket, there are others if i'm right, check www.intel.com
     
  17. stuy_b

    stuy_b Guest

  18. G-Lizard86

    G-Lizard86 Guest

  19. stuy_b

    stuy_b Guest

    i dont see any socket 370's there m8.. so I stand correct.
     
  20. G-Lizard86

    G-Lizard86 Guest

    no i meant that the 478 socket is not the only p4 socket