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3.0 @ 3.6/3.8 slow?

Discussion in 'Hardware' started by daba, 3 Jul 2004.

  1. daba

    daba New Member

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    I recently overclocked my 3.0C which was at 3.6 to 3.8 (at 1,60 Vcore) because of some new RAM I picked up. Originally at 3600Mhz I would get a horrendous Super pi score of 41 seconds with most processes disabled and super_pi.exe priority set to realtime. At 3800MHz I could run Super pi again and various other benchmarks and got the score to 39 seconds. This is very slow for a 3.6 and a 3.8. Since the system crashed with 2xPrime95 at 3800MHz, 3750MHz, and 3700MHz and wouldn't boot with 1.625Vcore, I am currently testing back at a stable 3,6GHz. Anyone know why the 3.6 is performing so poorly?

    Here are Zeitgeist 2004.6's specs:

    3.0C @ 3.6; Vcore 1.575
    Asus P4P800 Deluxe (BIOS 1016)
    2x512 MB Kingston HyperX PC4000 @ 240 FSB running 1:1 (3-4-4-8)
    ThermalTake 480W Butterfly w/ Active PFC
    SP-94 w/ ThermalTake 92mm smart case fan

    I originally had some HardcoreCooling.com generic cas 2.0 PC3200 (2x512 MB) running 5:4 (2-3-3-6). I thought this was the root of my performance shortcomings, but apparently not.

    I should add that RAM did play a crucial role in this situation. Back when I had PC3200 I could not run any program above 3,6 GHz. With this PC4000 not only can I get into XP at 3,8 GHz, I can also run various benchmarking software (but it doesn't survive dual prime).

    What could it be?

    Thanks in advance,
    daba
     
    Last edited: 3 Jul 2004
  2. Mister_Tad

    Mister_Tad Will work for nuts Super Moderator

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    superpi relies very much on system bandwidth

    you either need ram at a moderate speed with very tight timings or ram at an insane speed with relaxed timings
     
  3. Froggy

    Froggy New Member

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    Try reducing your clock speed a bit. i noticed that my chip actualy ran slower in benchmarks and stuff at its upper limits in speed. i reduced it a little bit and it runs great.
     
  4. Mister_Tad

    Mister_Tad Will work for nuts Super Moderator

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    runs slower at higher clock speed?
    that just doesnt make sense :confused:

    maybe at a higher clock speed the board uses a divider on the ram, which could make it run slower, but the only explanation other than that would be that the chip is too hot and it was throttling
     
  5. Kameleon

    Kameleon is watching you...

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    And both of these options should not be turned on in the BIOS, auto-dividers and -throttling is not good for overclocking :)
     

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