how to reach higher multipliers w/ Thoroughbred-Core

[Marco]

Hello,

I'm asking myself how to reach higher multipliers than the factory ones with and amd Thoroughbred-Core XP 2000+

I'm using an Abit KT7A rev 1.3. It supports the multiplier
"12,5/13" and "=>13" just to mention the last ones.
The XP 2000+ runs normaly at 133x12,5 = 1666MHz.

I always read about how to reach lower multiplier settings...
that's not what I'm looking for.
I want multiplier settings like 13,5 or 14.

Now it doesn't make any differences wether I choose 12,5/13 or >=13 -- I always get x12,5 (BTW I really don't know how to understand these 2 settings...)
I also tried the setting x12 and x5 (I think it wsa the lowest one, maybe it could also be x5,5).
All with the same result: the pc won't boot.
Then I always have to follow my personal method of "how to get things right again": pull out the xp - insert my old duron 900. enter the BIOS set the multiplier to x12,5/13 save and exit;
Turn off the pc fast, pull in the xp, clear the cmos and then it will start again and recognise my xp - BTW I do have the newest BIOS revision.

It's the point that now I'm running my xp at 145MHz x 12,5 = 1813MHz. Because my memory won't reach higer speed and want to higher the multiplier. But I really don't know how it can be done!

Thanks

Marco

[candjac]

Originally posted by Marco
I'm asking myself how to reach higher multipliers than the factory ones with and amd Thoroughbred-Core XP 2000+

I'm using an Abit KT7A rev 1.3. It supports the multiplier
"12,5/13" and "=>13" just to mention the last ones.
The XP 2000+ runs normaly at 133x12,5 = 1666MHz.

I always read about how to reach lower multiplier settings...
that's not what I'm looking for.
I want multiplier settings like 13,5 or 14.

But I really don't know how it can be done!
Marco

<a href="http://www.beachlink.com/candjac/index.htm">
http://www.beachlink.com/candjac/index.htm</a>
Then link to Workarounds article, esp the sections on accessing the 13X and up high range. But in brief here...

The workaround/s basically reset the 5th bit HI by manually opening the 5th L3 cause your mobo and many others are apparently unable to reset that bit to HI...as they seem to be able to control only the 1st 4 bits/signal circuits.

Then on reboot you get into the bios as soon as possible in case the "new" default setting is too high or "Reserved". Then in the bios you set 8X less than you want, for example set 5X to get 13X, 5.5X to get 13.5X, 6X to get 14X...but there are exceptions to this 8X more rule, see Table of Settings in Tbred article.

It has worked in past on some mobos because the Multiplier doesn't care "how or when" the the 5 bits are reset, it's happy with 4 bits set in bios, 1 bit set manually, it only cares about the "5 bit combination".

Worth reading the Multiplier Code article also to "understand" AMD's Multiplier Code.
John C.

[okra]

Beyond what Candjac suggests, there really isn't much you can do, short of getting a kd7-e or nf7-s.
I think the regular kt400 chipsets also have all multiplier control.

If you do figure it out, and get it to work, please post your results!

[Marco]

Ok, thank you.
I know that I have to change the 5th
bit 8X Vale of the L3. Are there any other possibilities to reach the same goal?
I'm not that kind of experienced with opening bridges.
What is with the L1 bridges? Do I have to change them too? Or is the T-Bred kind of
prepared there?
If there aren't any other real possibilies I would be thankful for any "beginner-hints"
Thank you

[Marco]

I've heard about really cutting the bridge or "burning" them with battery power - what's best and how to do it?
What is with those reserved multipliers?
I'm now using x12.5.
If I'm going to change my last L3 bridge, will I only be able to use x20,5 as multiplier? Or can I decrease it then.
You know it's like my computer won't start again, when using any multipliers lowers than 12.5 right now
Thanks

[felix88]

Marco, candjac helped me out with a very similar question in this thread:

http://www.xtremesystems.org/forums/...&threadid=9455

and i've also read about using a battery to disconnect the bridges. here's a thread where someone tried it.

http://www.xtremesystems.org/forums/...&threadid=9307