wire method question

[MadGhOsT]

hello all..
I have read in countless threads that people recomend the use of the wire method to unlock the lower multipliers, because they have a high fsb.. In my case, my fsb is curently at 145, and i have the lower multipliers unlocked by default <13x... therefor i need the higher multipliers to overclock.
My question is.. will the wire method unlock my higher multiplier? >13x
THNX

My system configuration is
Epox 8k3ae
athlonXP JIUHB 1800@2200 12.5x145
Maxtor DiamondMax plus 120GB
512MB Generic DDR266

 

[Jeff7181]

I believe the "wire method" unlocks all multipliers. I think the reason you've seen that it unlocks lower ones is because people buy a processor with a multiplier of 13 or higher, but they want to lower it to about 11 or so so they can use a 200 Mhz FSB. Same works in reverse though... if your CPU's multiplier is say, 12.5, and you want it higher, but your motherboard isn't stable with a higher FSB, you can use the wire method to unlock mulpliers 13 and above.

 

[dml54]

Yes it works, I used it to let me use a multiplier of 15 instead of the 12.5 I thought I was stuck with.

 

[estew33]

What is the wire method. I never heard of it.

 

[IEatChildren]

Keep in mind some motherboards don't even have a 13x multiplier.
My old Iwill XP333 had up to 12. But apparently it would detect the speed of my 2400+ and run it at 100mhz SFB at 20x multipler.
I had no trouble running it at 12x166 though.
And I had to use the wire trick to do this, because the multiplier was locked at 20x since it was auto-detected. But I still didn't have access to 13x and up, since the mobo didn't have them at all.

 

[KF]

There is one wire trick to get the high multipliers and and another one to get the low multipliers. One sets a certain pin high, the other sets it low. That pin is the fifth multiplier pin. Originally Athlons only had four.

Even if your BIOS does not list high multipliers, you can get them, because it will still set the other 4 multiplier pins to different multipliers. What you need is to know what low multiplier translates into the high multiplier you want. It is pretty strange, and I've listed them many times. Some of the settings produce a no boot, and for that reason people get the impression that their mobo cannot be adapted to Tbreds and Barton's.


In addition, some mobos have a bug that will make it impossible to ever boot the CPU if you have to reset the CMOS. Others will boot the CPU in that case to the "default" set at the factory. Still others will boot at 20x, which will be too high (2667) to boot if the FSB is 133, but will usually barely make it if the FSB is 100 (2000).

high multiplier, BIOS setting:

none 11 (won't boot)
19 11.5
none 12 (won't boot)
20 12.5 or 12above

13 5
13.5 5.5
14 6
21 6.5
15 7
22 7.5
16 8
16.5 8.5
17 9
18 9.5
23 10
24 10.5

another possible bug on old mobos will make 13, 13.5, 14, and 21 not boot if they are set by this method from the BIOS.

 

[IEatChildren]

Does this mean there's a way to get access to 2, 3 and 4?

 

[DivideBYZero]

I have used it to get a higher multiplier than my board could set. See sig.

 

[KF]

>Does this mean there's a way to get access to 2, 3 and 4?

You mean multipliers 2, 3, and 4? No.

I've gone through all the 32 combos you can get with the 5 multiplier bits. There is no 2, 3, or 4 on Tbred Bs.

The two 'no boot' multipliers listed are said to have a function in mobile processors. I don't what they do there.

Binary Hex ratio BIOS map XP model(MHz@133FSB)
00000 00 11 1700(1467)
00001 01 11.5 1800(1533)
00010 02 12 1900(1600)
00011 03 12.5 12above 2000(1667)
00100 04 5
00101 05 5.5
00110 06 6
00111 07 6.5
01000 08 7
01001 09 7.5
01010 0A 8
01011 0B 8.5
01100 0C 9
01101 0D 9.5
01110 0E 10 1500(1333)
01111 0F 10.5 1600(1400)

Binary Hex ratio BIOS map
10000 10 n 11
10001 11 19 11.5
10010 12 n 12
10011 13 20 12above
10100 14 13-n 5 2100(1733)
10101 15 13.5-n 5.5 2200(1800)
10110 16 14-n 6 2300(1867)
10111 17 21-n 6.5
11000 18 15 7 2400?(2000)
11001 19 22 7.5
11010 1A 16 8
11011 1B 16.5 8.5
11100 1C 17 9
11101 1D 18 9.5
11110 1E 23 10
11111 1F 24 10.5