2500 Barton past 12.5 multiplier?

edited December 2003 in Hardware
I got a 2500 barton thats extremely stable and cool going up to 2800 speeds (11 to 12.5 on the multiplier). I want to take it further but 12.5 is the highest option on my mb bios (biostar M7NCD Pro). Is there any way i can take this higher? Changing the multiplier is the only experience i have with cpu overclocking.

Comments

  • Mt_GoatMt_Goat Head Cheezy Knob Pflugerville (north of Austin) Icrontian
    edited November 2003
    Take it back down to 11 and increase the FSB by 5 at a time. When you have trouble back dow by 1's.
  • edited November 2003
    Ok but i thought i shouldn't change the fsb because my ram is pc2700 and i've heard i can get into timing issues if the ram speed doesn't match the fsb on the processor or something.
  • GHoosdumGHoosdum Icrontian
    edited November 2003
    What brand is your PC2700? There's a chance you can bump both the processor and the ram to 200MHz FSB. If you keep the multi on the XP2500+ at 11 and go to 200FSB, you're at 2.2GHz, XP3200+ speed.
  • W4R-H1LDW4R-H1LD Chesterfield VA
    edited November 2003
    I also picked up the barton 2500 a few days ago and purchased 2x256pc3200.***no name brand memory got from mom and pop computer shop...it is samsung thou**** Currently have it 11x200 = 3200+ and running just fine. Id love to squeeze some more out of it if possable like Caxus what would be the best approach, current memory timings are 8,3,2,2 does this come into play if i start increasing my fsb. Im totaly new to overclocking and dont yet understand how everything ties in together. Should I back it down to 10 x and go the fsb way or ? Thanks in advance:D
  • GHoosdumGHoosdum Icrontian
    edited November 2003
    What mobo do you have, W4R(H1LD?

    You can try increasing the FSB first, as that usually gives better gains than multi. However, run some benches as you go (and keep an eye on temps and stability) also, the memory timings tend to loosen as you up the FSB on the RAM, so you reach a point of diminishing returns in performance if your RAM can't take it.
  • W4R-H1LDW4R-H1LD Chesterfield VA
    edited November 2003
    ASUS A7N8X nforce2 SPP ultra chipset so it can go 400 fsb so far
  • GHoosdumGHoosdum Icrontian
    edited November 2003
    You should be able to get 210 maybe 215 out of it with stock northbridge cooling. I like the Asus board. :thumbsup:
  • edited November 2003
    My ram is Apacer. So even though the cpu is 333 its ok to go up to 400 on the fsb without screwing stuff up?
  • GHoosdumGHoosdum Icrontian
    edited November 2003
    Yeah, the CPU can do 400 FSB no problem. It's really the same core as the XP3200+, which has a 400MHz FSB. Just keep an eye on your temperatures, and the NForce 2 motherboards can run the CPU and RAM FSB asynchronously. I don't know what kind of performance hit you'd take there, but I ran async for a while and didn't notice anything.

    Also, what kind of cooling do you have on the CPU?
  • edited November 2003
    Cooling is a Volcano 7 with antec silver compound.
  • Mt_GoatMt_Goat Head Cheezy Knob Pflugerville (north of Austin) Icrontian
    edited November 2003
    Get one of the SLK-900's listed at SVC for 20 bucks and a good fan. You will get a lot more out of it that with the Volcano.
  • GHoosdumGHoosdum Icrontian
    edited November 2003
    I believe you use coupon vf900a to get the SLK-900A for $20. It's a great heatsink. I got mine in the mail today... man that sucker's heavy! Make sure you get a CPU shim too if you put one of those bad boys on there!
  • Mt_GoatMt_Goat Head Cheezy Knob Pflugerville (north of Austin) Icrontian
    edited November 2003
    I didn't use a shim but made sure to put the little pads on the spots indicated and haven't had a problem. Same with my SLK-800.
  • leishi85leishi85 Grand Rapids, MI Icrontian
    edited November 2003
    yeah, no shim needed, or necesary.

    and running your ram and fsb async kills the performance. at least for amd based systems, so don't do that.
  • MJOMJO Denmark New
    edited November 2003
    WTF only 20 bucks??????
    It costs $55 here in Denmark.
    That is outrageous. :rarr:
  • ThraxThrax 🐌 Austin, TX Icrontian
    edited November 2003
    CPU shims will destroy your CPU.

    I suggest against it.
  • GHoosdumGHoosdum Icrontian
    edited November 2003
    Thrax had this to say
    CPU shims will destroy your CPU.

    If you install the shim incorrectly, yes it will destroy the CPU. But I've never experienced the destruction of a CPU due to the shim... what makes you say this?
  • ThraxThrax 🐌 Austin, TX Icrontian
    edited November 2003
    Shims slide on the surface of the processor due to the simple fact that it's sitting vertically.

    Additionally, when you set the shim down, even if such is done correctly, you present the additional risk of moving it in the wrong direction when you set the heatsink on it.

    In another regard, shims are often too tall for the CPU, and as a result leave a rather large and CPU-toasting gap between the core and the sink

    There have been numerous substantiated stories on the web where the last scenario has happened, as well as the first two which resulted in bridges accidentically being connected which should not be connected in operation.

    Best to not use them.
  • edited November 2003
    Well i just tried it out with the 200 fsb and 11x multi (xp 3200 speed) and i actually got about 200 points less in 3d mark 2001se than when i had it set to the 2800 speeds by just upping the multiplier. I guess having the timings off really does make it run slower.

    So is there any way possible to up the multiplier a bit more or are 2800 speeds pretty much the best i can do?
  • Mt_GoatMt_Goat Head Cheezy Knob Pflugerville (north of Austin) Icrontian
    edited November 2003
    There are also too many different shims out now. Different thicknesses and cutous for the different socket A chips. Using the wrong one could short the chip, crush it or position the sink off the core completely. Just use the little pads supplied and all will be well in Lilliput. ;)
  • edited November 2003
    Seeing that you have an unlocked barton because you have been able to change your multi, you can use the wire-in-the-socket trick from ocinside.de to map a higher multi than the present limit of 12.5. Just look at the socket view of the multiplier that you want and carefully place a thin strand of copper wire in each of the connections you have to make. I used the strands out of an old floppy ribbon cable to do the wire trick on my P3S's socket to get higher vcore, which is the same type of mod as the multi changing on the barton.

    Here is the link to their pinmod page.
  • edited December 2003
    I also have the xp2500 barton i just started messing around with over clocking. Right now its running at 2.02.What i was wondering is if i raise the vcore do i lower the fbs settings and play with it that way. Or which would be a better setting for gaming. My bios setting also goes up to 13.0

    vcore;1.725
    multi;11.5
    fsb; 175mhz

    my specs are:

    xp2500
    msi k7n2g-ilsr mobo
    2-512 ddr pc2700 samsung (dual channel)
    msi g-force4 ti-4200
    thermaltake volcan5
    1 intake fan
    1 exhaust fan
    300 watt agi power supply
    1-120 gig ibm 8mb hd
    1-80 gig ibm 8mb hd
    54x cd-rom
    54x cd-burner
    win xp pro
  • Straight_ManStraight_Man Geeky, in my own way Naples, FL Icrontian
    edited December 2003
    Um, multiplier and voltage, lower for lower multiplier,higher for higher, LOTs of cooling for CPU and case needed as you will Overheat more than just CPU with high multiplier unless rest of board is running a lot slower, then CPu has to wait fro other things more. Best OC is balance, overclock everything some.

    Lack of REAL GOOD (aka GREAT) cooling plus OC means things die, including the Capacitors on mobo, and do so 2-4 times as often as otherwise. Good PSU needed also for best results.

    John.
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