I have a pair of AMD MP 2000+ processors that were purchased in 2001. I am not sure what core it is. I would like to change the multiplier from 12.5x to 16.5x using the diagrams from this site http://www.ocinside.de/go_e.html?/html/workshop/socketa/tbred_painting.html

(note '-' is cut; '|' is joined)
L3 for 12.5x (1663MHz) is:
--|||

L3 for 16.5x (2195MHz) is:
--|--

From the above, all I have to do is cut the last two bridges on L3 and I should be all set (same voltage, FSB, etc.). I chose this multiplier for two reasons

(a) All I have to do is cut two bridge, and have to do no joins which is a bit more cumbersome.
(b) The highest clocked MP is 2133MHz, so 2195MHz is close by.

Will it work? Do AMD chips have any other difference which prevents older chips from running at higher clock speeds?

Raising the multiplier is not the best way to overclock...the advantage of an unlocked multi is so you can LOWER it & raise the FSB even higher. FSB is where the real performance gains are.

I used to recommend that site to others, but after following their wire mod recommendations (which were wrong), I've backed off on it. At best, it should be used as a guide...look for independent verification before making any cuts. Wire modding may be the better route to go...at least they're not permanent.

Asus A7N8X-X
1800+ @ 8 x 210MHz
768MB PC3200
Asus A9550 128MB/128-bit
Gamer Edition
WinME/WinXP Pro

http://www.themodfathers.jolt.co.uk/?page=&action=show&id=6144

Asus A7N8X-X
1800+ @ 8 x 210MHz
768MB PC3200
Asus A9550 128MB/128-bit
Gamer Edition
WinME/WinXP Pro

My main question: Is it possible to make such a huge jump in multiplier. My motherboard/ram/chipset will only support 266MHz FSB, so FSB overclocking is limited in my case. I have seen cases where people try a +2 or so multiplier change, I am talking about a +4 multiplier change. I am wondering if AMD keeps an internal limitation on how much the cpu will scale irregardless of the actual multiplier setting using bridges. Otherwise, it seems everyone simlpy need to alter the bridges on the lowest end of the processor rather than plunking money on slightly more expensive ones.

Any comments?

Overclocking via the multiplier does very little for performance when compared to FSB overclocking, that's because the FSB affects the entire system, but the multiplier only affects the CPU. Will your board allow you to raise the CPU voltage? You're not gonna overclock that much (30%+) without a voltage increase.

If you wanna experiment, I still say wire modding is the way to go...there's no cutting or connecting of bridges, so you won't physically damage the CPU (unless you fry it).

Go to the AMD website & download the Data Sheet on the Athlon MP...it'll be a PDF file. Open it & look for the section on Pin Descriptions...then look for "Clock Multiplier Encodings", then compare that to the pinmod guide for the Athlon XP & see if you can make sense of it:

http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_739_2989,00.html

http://www.ocinside.de/go_e.html?/html/workshop/pinmod/amd_pinmod.html

Check this post, response #9 has an explanation of how to change a pin value from 1 to 0, or vice-versa:

http://www.computing.net/cpus/wwwboard/forum/11352.html

Asus A7N8X-X
1800+ @ 8 x 210MHz
768MB PC3200
Asus A9550 128MB/128-bit
Gamer Edition
WinME/WinXP Pro