Manipulating the L6, L3, L4 multiplier bridges on Socket-A

[dajo]

I cut these bridges on my Duron 700 with a fine exacto blade. I didn't destroy the CPU, because if I pencil in the L1 bridges it runs fine on my KT7.

However, whether I pencil in the settings for 7x or 9.5x, it still comes up at its default of 700MHz (have cleared CCMOS on board each time I put CPU back in socket).

What am I missing here? Don't you just connect the L6, L3, and L4 bridges with pencil to set the multiplier?

 

[Tonec]

So you actually went ahead and cut the l6,l3,l4 bridges? That shouldn't have been necessary on the kt7, the point of spending extra for the abit board is to have the convenience of manipulating the multipliers in bios.

 

[dajo]

It isn't necessary. I did it for fun, and to see if I could hardwire the multiplier. I have several Durons and one TBird.

I just wanted to see how it works, but I don't understand why:

1) it boots at 700MHz no matter how I pencil the multiplier bridges (have cleared board to make sure it reads CPU settings)

2) it won't boot at all unless the L1 bridges are connected.

I can see why #1 exists, which would indicate that none of the multiplier bridges have actually be severed, but I don't get #2. Why does the chip need the L1 bridges to be connected in order to boot?

 

[johncar]

dajo,
Go here http://members.nbci.com/candjac/index.htm Duron OC article to understand the oc'g circuits. There are detailed pics and circuit diagrams which should explain all. But here's what we think in your case......

If you have a motherboard with a full set of hardware or bios to over-ride the default settings, all you have to do is to close the L1 bridges to "enable" the mobo to over-ride the default bridge settings made by AMD.

We are not sure exactly what you did to the L3, L4 bridges. If you "opened them all", then closed 4 of them to create the oc setting/s you want, it should be OK, except you are now depending on a lot of pencilled bridges, and if some do not reclose their bridges it will be a mess. Also, if the L1 bridges are closed, then there may be an interaction from settings on the mobo/bios interacting with your changed settings of L3, L4 bridges.

Point is...if you make individual settings on bridges the L1s should be open...and the FID settings should match BP_FID settings.
If you want the mobo to over-ride the default settings, then only the L1 bridges need to be changed to closed.

Since we are not sure what you have done, go to the site and verify for yourself. It's not that complicated, and the article covers both
mobos that are capable of over-riding defaults and those that are not able.
John C.

 

[IaPuP]

Hey- Dajo- email me.

I want to talk to you about this.

I've been pouring over some schematics and circuit diagrams trying to find a way to hard-wire the thing without cutting bridges.

I'm unable to figure out a way to do it to the L6 bridges but I have some ideas.

Lets compare notes and I want to hear/see exactly what you have done to see if there's anything wrong with your methodology.

Eric