Question about an MSI jumper

BaconBacon
edited November 2004 in Hardware
Ok, I have the MSI-Delta-LSI (MS-6570XA) And there is a jumper called J10 and it sets the CPU FSB if the top two pins are shorted (top and middle), However if the bottem two (middle and bottem) pins are shorted it is running 100FSB for "safe mode". Since i am running 166FSB would i just open the J10 jumper?

the default is the two two pins (133FPB)

Comments

  • ThraxThrax 🐌 Austin, TX Icrontian
    edited November 2004
    Do you mean Delta-ILS(R)?

    If so, the J10 jumper is to fix the no-boot bug on early versions of the nForce2 chipset, wherein the system would respond to no power-on command except when a 100FSB processor (Early Socket A Athlon/Duron) was inserted -- Then the problem would be solved. If you had this issue, you would short the bottom two, reset the FSB in the BIOS, and then return the jumper to the 133 position, or simply take it off after you powered the system back down.

    That said, you can either leave it on 133, or take the jumper off. Doesn't really matter. There were rumours that leaving the jumper off improved overclockability, but I don't believe they were ever substantiated.
  • Straight_ManStraight_Man Geeky, in my own way Naples, FL Icrontian
    edited November 2004
    What leaving the jumper OFF will do is let you adjust toally with BIOS. So, if you want an FSB that is non-standard because you can get OC advantages with RAM AND CPU that are OCable, then you might get a benefit from leaving it off. As Thrax said, for that board exactly no-one has explained exactly how to do this adn substantiated it-- but I have done this with other MSI boards over the years-- leaving the FSB jumper empty or with the shunt\block PARKED (one end hooked to one pin, other end hanging in air, you get the ability to set things not standard or greater than either jumper setting.

    Example:

    With RAM that can run at 166 MHz or above, and a CPU that has a base rate of 166, leaving the jumper off can get you decent advantages. IF you have RAM that will not base at 166 reliably or a CPU that needs a base of 133 then I would leave it on at eh 133 setting unless you can get a 10% OC advantage with it off totally by microtuning settings to non-standard steps. And that is partly CPU and RAM (as pair of component types) determined. Note the ANDs, they form the BOOLEAN basis of the rule. J10 set is safe locked FSB to a fairly tight figure, no jumper, you get to determine what is stable.

    In theory, with jumper off you can run RAM async to CPU, if your BIOS rev on your board supports this-- RAM can be a tib faster and this can benefit app start times and performance. with jumper on, you will not get stable async. I've done things like this with 15 models of MSI board over the years, and though the FSB jumper numbers have varied slightly, base function where total BIOS control could be obtained or hard jumper was used to restrict things(by overriding with hard circuit control jumper the settings chosen in BIOS, if needed) and make the system safer was the same.

    Try it with jumper off or parked, if system is rad unstable for any group of devices then look for a new BIOS rev (assuming you know how to flash BIOS or have a friend who does), then if needed stick the jumper back on. That would be the order of preference for me here.
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