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It's also very easy to increase the Vcore of MSI
K7T Turbo by soldering just one resistor to the right point
to allow your CPU much higher frequency.
Of course it's necessary to be very careful if you're soldering something
on your mainboard in order
not to kill your board.
And of course your warranty void if you solder anything on your mainboard
!
Therefore i recommend a good grounding and a soldering station with
seperate grounding !
Before you begin to modify the Vcore you should
lower the momentary Vcore
at least about 0.3 Volt !!!
The Semtech SC 2422 is the MSI K7T Turbo
voltage regulator (Biphase Current Mode Controller).
This voltage regulator have a pin (FB/pin 7) for the voltage correction
to allow manufacturers an optimal adaption
of the Vcore and allows us to increase the vcore to "our correct
Vcore" :-)
In my test i used a normal 1/4 Watt resistor with 33
KOhm (orange, orange, orange).
You can easy detect the positions of the two soldering points on this
picture:
In the enlargement i've marked the two easiest positions with red points.
You'll find this voltage regulator near the socket.
I didn't solder the resistor directly to the board in order to modify
the resistance value once again.
Just solder the resistor to a cable and then solder this cable to the
marked pins.
After this modification you should check the correct position and don't
pull the soldered wire !!!
Now put adhesive tape or a small piece of heat shrink sleeve over the
resistor that it's impossible to get
a connection with other components.
After this small modification your Vcore should be about 0,3
Volt higher than the selected Vcore of your BIOS.
So if you select a Vcore of 1,5 V the real ! Vcore is 1,8 Volt and with
a selection of 1,75 V you'll get 2,05 Volt.
And you'll get a really nice Vcore of 2,15 Volt
if you set the voltage in your BIOS to 1,85 Volt.
If that's still not enough for your CPU you could solder a smaller resistance
value to the shown points
but the risk to destroy the processor is very high.
I've also written a small script to calculate the right resistor value
for the desired Vcore:
Pay attention to the CPU temperature after increasing
the Vcore !!!
All pictures and articles copyright 2001 of www.ocinside.de
!
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