Overclocking the inexpensive AMD TBred-B Duron
(2) AndyB
24 Aug 2004
Next step: 2.2GHz at 1.80V Vcore with the Mobile mod
The Mobile mod means we are going to transform the Duron into a mobile
Duron, similar to what was previously described by Eversor in a
very nice article here at OCWorkbench. A detailed technical
explanation can
be found at the Fab51 website.
This mod requires either:
A pencil and a little bit of luck, or
A droplet of silver conductive paint.
Also needed is a K7S8XE or K7S8XE+ mainboard. The SiS 746-based K7S8X
northbridge is not
rated for 400MHz FSB.
Both methods involve a small, reversible mod done to the CPU itself, so
the first step is to remove the CPU and lay it on a flat surface.
Identify the laser pit
that corresponds to the Mobile bridge. You'll notice there are some
laser burns cutting the L5 bridges. What we need to do is reconnect the
L5 [2] bridge. Before you begin, clean the CPU surface with some tissue
and alcohol.
The pencil method is simpler, obviously, but it doesn't work all the
time: just use a sharp 2B pencil and rotate its tip in the L5[2] laser
pit.
Re-install the CPU and turn on your machine. If the Duron is recognized
as a mobile Duron you are set, otherwise you should use the second
method.
The second method involves filling the laser pit with a very small drop
of silver
conductive paint, as shown above. This kind of paint can only be bought
in electronics
hobby shops, but you can also find a similar product in automotive
parts shops.
Now we need to set the FSB jumpers on the mainboard to 400MHz, and make
sure the Vcore voltage and CPU temperature are OK in the BIOS.
When the Duron is modded to mobile, it always starts with the
multiplier set to 11x, so we get this:
![A very small drop of silver paint was used to fill the L5[2] laser pit.](Pit_filled_1.jpg "A very small amount of silver paint is needed to fill the laser pit")
