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little advice please

Discussion in 'Overclocking & Cooling' started by AlanJ, 23 Jan 2006.

  1. AlanJ


    Joined: 16 Nov 2005

    Posts: 684

    Location: Torquay

    Hi there,
    Ive managed to overclock my cpu with no errors 100%. My processor runs at 1.93GHz at stock and ive managed to overclock it to 2155 MHz (11.5 x 187) Vcore at 1.65. Im not to sure what my ram timings are set to.

    Anyways more to the point, when i go 2mhz to make it 189 it becomes unstable but the temps remain nice and cool.

    Any advice on what i could change in the bios to make matters better?

    Abit K7DA
    2X512 PC2700
    480w Hiper Type-R PSU
    AMD barton xp 2600+

    Thanks in advance.
  2. Matt82


    Joined: 13 Mar 2004

    Posts: 16,569

    bit more vcore

    ive got a barton running 1.85
  3. mp260767


    Joined: 4 Feb 2003

    Posts: 10,820

    Location: telford, shropshire

    could look at raising the vcore, i wouldnt go above 1.7v tho, raise the chipset voltage (if it shows) to 1.7 and raise the memory/dimm/vdimm to 2.7/2.8.
  4. Topitoff

    Wise Guy

    Joined: 28 Apr 2004

    Posts: 1,911

    Location: 19th Hole

    The mobo has a VIA KT400A chipset which does not have AGP/PCI locks; so you are overclocking these buses when you up the FSB. The instablity is probably here; in extreme cases too much fsb can result in the gfx card and PCI bus being fried!
  5. Soul Rider


    Joined: 29 Nov 2005

    Posts: 434

    Location: Milton Keynes

    your only hope is to drop the multiplier to 11 and push for 200fsb, but that would require doing a mod on the chip. other than that you wont get this system to be stable at much of an overclock due to the pci/agp requiring a denominator of 33 to function perfectly
  6. Topitoff

    Wise Guy

    Joined: 28 Apr 2004

    Posts: 1,911

    Location: 19th Hole

    At fsb 200 the Ratio (FSB:AGP:pCI) must be 6:2:1 - is this an option in the BIOS? if not then it looks like you've gone as far as you can with this mobo.

    For better OCs you will need a NF2 400 ultra chipset mobo like the Abit NF7 v2.