As we are not 100% clear on what each individual bridge
does in the L3 and L4 groupings, we simply focused on duplicating what
we saw on the reference XP 1600+ chip. Their may in fact be other combinations
which will work equally as well. After all the modifications had been completed
the surface of the AthlonXP 2100+ looked like this:
After plugging in the newly modified AthlonXP
2100+ into our reference Epox 8KHA+ motherboard we were greeted with a very nice POST screen identifing it as
an XP 1600+, which is exactly what we wanted to see.
Upon entering the BIOS on the Epox 8KHA+ we
had full multiplier control from 6x-12.5x. Access to multiplier settings
above 12.5x would no work however. Since we were not really interested
in raising the multiplier above 12.5x this wasn't a concern. As you probably already know,
lowering the multiplier and jacking up Front Side Bus results in
higher overall system performance. Clock speed stayed around 1.9GHz (up from 1.73GHz of
the native XP 2100+) with simple air cooling and a Vcore set to 1.85V.
theAXP21K+ Unlocking Trick
always said publicly that it wouldn't stop enthusiasts from getting the most from their
processors, however the green AthlonXP 2100+ could not simply be unlocked with the
standard "fill in the pits and connect the L1 bridges" technique. Has AMD implemented
steps to make unlocking processors that much harder? Frankly we're not sure.
It was only after some time and considerable
effort that we were able to piece together a plan of attack and come up with the
AXP21K+ unlocking trick. While it most certainly put the life of the AthlonXP
2100+ processor in harms way, we were able to accomplish the task by slowly and
carefully working on the tiny bridges on the surface of
Previous to the AXP21K+ unlocking trick we
were able to overclock the AthlonXP 2100+ by simple FSB adjustments to 1.89GHz
(145 FSB). After the AXP21K+ unlocking trick was engraved in OPGA (so to speak),
we saw a clock speed of 1.9GHz with a FSB of around 180MHz. This means
that while the processor clock speed is essentially the same as with the
overclocked settings, there is a larger amount of bandwidth available to the
processor which results in improved overall
If you have any questions, please post them in the forums so
everyone can see them - I will not be replying to individual questions about
this mod in email.
[Special thanks to Mike V. for being crazy
enough to bring a Dremel to the surface of an AthlonXP 2100+!