Tualeron In A BX
August 30, 2002
Updated Friday, October
For those of you with little
patience for reading, the slotket adapter is
*the* most important part to this mod. User
Spajky and Dave001 have made us a list of compatible
slotkets. To get basic functionality with
this mod, you will have to do a little work
on your processor and slotket. Your motherboard
will go unchanged, for now. Check out the Tualeron
Success Chart to see how other modders fared
and what mods they used.
So, you have one(1) slot 1 motherboard,
a Tualatin Celeron and a compatible
slotket. If your slotket is not listed as
'compatible', then check this article
to get you going. There are 2 methods of completing
this mod: the easy way and the hard way. The
easy way will VOID your cpu's warranty but will
get you running within 10 minutes. The hard
way will require a few supplies, some tools
and a little know-how.
The Easy Way
This is going to void your cpu's
warranty. Break the 3 red pins off of your cpu
with a pair of needle nose pliers or other suitable
tool. Be careful not to bend the other pins
surrounding the 3 red ones.
Another choice you have to make
is whether you are going to overclock this cpu
or you are happy with the stock speed of the
cpu. Some of you have a motherboard that has
a max Front Side Bus(FSB) of 100 MHz so the
choice is made for you since the Tualatin Celeron
operates at 100 FSB.
Non-overclock: Connect pin AK4
to pin AJ5 on the cpu(BLUE).
AK4 is looking for 1.25v and if you run your
cpu at 1.45v, then AK4 is going to get 1.45v
too. AJ5's voltage will vary depending on what
you set in the BIOS as it is directly controlled
by the voltage regulator on the mobo.
Overclocker: Connect AK4 to AN11
on the cpu(GREEN)
since AN11 is a constant 1.5v. This is the lowest
voltage we can find on the socket that is close
Note: Some people *must* connect
AK4 to AK26 on the cpu(YELLOW)
to get the cpu to operate as the 2 above methods
don't work. But AK26 is 1.8v on a Pentium3 compatible
You are probably wondering how
to make these connections from pin to pin. The
easiest way is to use conductive paint on the
underside of the cpu which generally comes in
two types: copper or silver composition. The
copper type is used for repairing the rear window
defogger "lines" on your car. You
can purchase it from your local automotive supply
shop. It is the cheapest, easiest paint to find
but is quick drying and not as conductive as
the silver type. The silver paint comes in a
"pen" or little jar and is clearly
superior to the copper type but you will
pay more than twice as much for it.
The Hard Way
If I was going to do a quick
Tualeron Mod for a buddy for the lowest cost,
I would buy an OEM tualeron and use 'The Easy
Way.' However, we like using retail/boxed cpus
that come with heat sinks & fans since they
are usually a better yield cpu and we get a
3 year warranty. Overclockers enjoy the idea
they can run their cpus hard until they burn-out
while relying on the warranty to get a replacement.
We don't condone this idea, but we know it goes
on. To maintain the warranty you can't cut off
any pins so that means using some form of insulation.
users have reported using IDE insulation
striped off a single wire. We had some
green wire lying around the lab that was
a little thinner but harder. The green
insulation needs a little push to fit
on the end of a sewing pin.
So, get 3 pieces of insulation
that will just cover the length of the
cpu pins. I used a sewing pin to widen
the hole in the insulation so that it
would slide onto the cpu pins easier.
Cover the same 3 red pins in the above
Also, choose which connection
is best suited to you: BLUE,
the connection on the cpu.
3 pins we have insulated will not fit
into the slocket's ZIF socket as they
are too thick. Remove the top sliding
cover of the ZIF socket using a thin screwdriver
and carefully pry the sides away from
the socket underneath. In the picture,
the top and bottom of the picture are
the latch points.
Drill the same holes in
the picture. You can verify you have the
correct holes by placing the cpu on the
ZIF cover. We used a 1mm(1/32nd) drill
bit for the green insulation while others
used a 2mm(1/16th) for the IDE insulation.
An Xacto knife or other blade will widen
the holes if you don't have a drill bit
handy. Clean the burrs off the 3 holes'
underside and replace the cover onto the
Note: We have read that small
pieces of sticky-tape inserted over the contacts
of the ZIF socket underneath the cover also
work as insulation. This would save us having
to drill the cover and insulate the pins on
the cpu. We will test this out in the future.
Update: We gave
the sticky tape method a try and it is by far
the best way to insulate socket pins. Just pop
the ZIF cover off and cut small pieces of tape(about
2 mm wide and 4 mm long) then push them down
into the socket pin where the cpu pin would
make contact. Use a toothpick or thin piece
of metal to press the tape onto the contact
patch to make it stick. You will probably have
excess tape standing up so carefully cut it
off with an xacto or razor blade. We used plain
old back-to-school sticky tape in the plastic
dispenser. No more drilling is needed and you
won't get bent pins anymore from the thick insulation.
We've managed to get a good overclocking
processor. Our retail 1.2A with stock heatsink
can do 1.557 Ghz @ 1.55v using the updated "Hard
Way" - BLUE and
sticky tape with an ASUS S370-DL ver1.2, an
Iwill SlotketII ver1.02, a MSI MS6905 ver1.1a(no
and a generic slotket(in this article).
All of them could run at this speed on our BX6rev2
@ 129 FSB.
Carefully insert your cpu into
the slotket and close the lever. It may be a
little stiff if you have used insulation rather
than cutting the pins off or using sticky tape.
A word to the wise. Don't open and close the
lever too much as the 3 pins with insulation
will begin to bend and possibly break off. One
unfortunate user has experienced this.
Add the heat sink with thermal
paste(the Intel supplied thermal pad is not
helpful in overclocking so remove it). Insert
the slotket into your motherboard and clear
the CMOS. Whenever you remove and reinstall
the slotket, clear the CMOS. Now see if there's
You should get a functioning
cpu in your BX motherboard after this mod. People
report varying degrees of stability so your
mileage may vary. We will expand on this article
as we test and improve our own Tualeron setup.
Thanks go out to everyone
in the forums for all their hard work and suggestions!
If the cpu won't power-up, you
may need to try the classic VID
mod, bridge AK4 to AK26, bridge G35 to G37
or possibly all of these.
If you need some help from fellow
modders, try any of the forums below.
The LunchBox Forums
Forum Thread at Overclockers.com:
Tualatin on CuMine MB w/o Powerleap"
Forum Thread at MadOnion.com:
on a BX Mobo works. No Adaptor Required"