OK you XP unlocking gurus- what junctions do I need to "fix" to get my XP2600+ 333 going?

[Skiracer]

Setup:
Athlon XP2600+ 333 MHz FSB
ID: AIUGB0245WPBW (week 42 chip)

Currently I can't get any multipliers above 13 (12.5) to work. (If I select a multiplier above 13 in the BIOS the result is a much lower multiplier).

Junctions on the chip as delivered:
L1: ALL 5 bridges CLOSED
L2: ALL 4 bridges CLOSED
L3: 1 & 2 cut (OPEN) 3,4,&5 CLOSED
L5: 1 CLOSED, 2,3,&4 cut (OPEN)
L6: All 4 CLOSED
L8: All 4 CLOSED
L9: All 4 cut (OPEN)
L11: 1,2,&3 CLOSED, 4 Cut (OPEN)
L12: 1 OPEN, 2,3,&4 CLOSED

Since the L1 bridges are all closed, then the L3, L12, or L5 bridges must be preventing accessing the higher multipliers. Who can tell me with certainty which bridges need to be modified? Any resource on the web that I can review?

TIA for any/all help!

 

[johncar]

This is a motherboard issue, it's been found that lots of mobos have problems setting Multipliers 13X and up, in fact some won't even boot with cvpus at 13X and up. Suggest you browse and ask around about
"how to get Higher Multipliers". There are threads but we've never saved them.

IF...you want to hard mod the L3s which are the bridges which AMD configured to set the default Multiplier., oc-inside.de has an interactive guide where you input Multiplier and he displays the open/closed configuration of L3s.

IF...you want to understand the Multiplier Code and some of the issues involved http://www.beachlink.com/candjac/index.htm link to Multiplier Code, Tbred, Palomino articles, lots of tech detail, but also Tables of settings.

BUT...if you go the hard mod L3s route, first ask around if your mobo will not "go bananas" when confronted with Multiplier 13X or higher...you're currently set at 12.5X, get 13X internal remap???
John C.

 

[SFang]

johncar,

I also unlocked my XP2400+, only be able to reach 12.5x, what is the "13X internal remap" you are talking about ? Thanks.

 

[johncar]

Originally posted by: SFang
johncar,

I also unlocked my XP2400+, only be able to reach 12.5x, what is the "13X internal remap" you are talking about ? Thanks.

Skiracer wrote "Currently I can't get any multipliers above 13 (12.5) to work."

This "suggested" to us that he might have gotten 13X for the default setting of 12.5X. This has happened in some older 1300 CPUs which had bridges set for 12.5X, but the CPU was "internally remapped" to 13X...the Multiplier module did 13X when it got signals for 12.5X.

But on second thought and your comment that you only got 12.5X, now believe that the13(12.5) he wrote might refer to a bios display and not how we interpreted it.
John C.

 

[Skiracer]

Thanks for the great inputs! A little more information/clarification:

My reference to the 13X multiplier meant that if I set the BIOS to 13, it would POST at 12.5. Same thing if I set the BIOS multiplier to 12X- the POST indicates 12.5X. That is part of my confusion- why the same result with two settings?

I am using a new Epox 8K5A3+ motherboard with the latest BIOS available. In retrospect, I should have gotten a KT400 or nForce2 based board, but I couldn't find one with dual-channel RAID.

 

[johncar]

Originally posted by: Skiracer
Thanks for the great inputs! A little more information/clarification:

My reference to the 13X multiplier meant that if I set the BIOS to 13, it would POST at 12.5. Same thing if I set the BIOS multiplier to 12X- the POST indicates 12.5X. That is part of my confusion- why the same result with two settings?

I am using a new Epox 8K5A3+ motherboard with the latest BIOS available. In retrospect, I should have gotten a KT400 or nForce2 based board, but I couldn't find one with dual-channel RAID.

First...partial disclaimer...we know AMD Multiplier Code very well, we know mobos very little, only generalities common to most/all?? So we never "guess"...it's a waste of time. However having said that...

Setting 13X and getting default 12.5X sounds like your mobo is unable to toggle the 5th 8X Bit Value signal circuit from LO to HI. This has been a common problem recently, ie inabilty of mobo/bios/?Nothbridge? to reset Multiplier to 13X or higher. Lot's of threads around on this issue, thinking is that most older mobos were designed to cope with only 4 bits, can't cope with/handle the 5th bit, esp when it needs to be HI starting with 13X, ref the "articles".

But setting 12X "should work". Can only suggest looking at bios to see if there is an "auto/manual" Multiplier toggling option in the bios you might have to set/reset. Think if set on "auto" it might ignore your resets. If so and 12X works, then try 13X again as that could also be the 13X problem as well.
John C.

 

[johncar]

BTW, check the "actual" Multiplier = Actual CPU MHz/FSB MHz, post screen might be wrong/looking at default???
John C.

 

[Noid]

same problem with my Abit KX7-333
The =>13 BIOS setting defaults to 12.5
but
I like my 192.3 x 11 = 2115 overclock

Who need those high multipliers?