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It's easy to increase the Vcore of Epox 8KTA3
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 0.2 Volt !!!
If there's a CS 5303 instead of HIP 6301
on your mainboard, please use the
Epox 8KTA3+ guide !!!
The HIP 6301 is the KT7 voltage regulator
(multi-phase Buck PWM CONTROLLER).
This voltage regulator have a pin (FB/pin 7) for the voltage correction
to allow manufacturers an optimal adaption
of the Vcore and we can also use this pin to increase the vcore to "our
correct Vcore" :-)
In my test i used a normal 1/4 Watt resistor with 12
KOhm (brown, red, orange).
It's also possible to solder a SMD resistor (123 = 12K) from pin 7 (FB)
to Pin 9 (GND).
But it may be that your mainboard doesn't accept the new voltage :-(
It's because of the Over-Voltage Protection - OVP.
If you are not able to select the multiplier (or something else) after
this modification
just take a higher resistance value (on some boards is 17 k = 2,03 Volt
the maximum).
Or solder a variable resistor from pin 7 to ground and find out your exact
OVP value.
On this picture you can easy detect the positions of the two soldering
points:
In the enlargement on the top right i marked the simplest places with
two red points and an R.
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 !!!
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 0,2
Volt higher than you've selected in your bios.
So if you select a Vcore of 1,5 V the real ! Vcore is 1,71 Volt and
with a selection of 1,75 V you'll get 1,96 Volt.
You get the highest Vcore of 2,06 Volt
if you set the voltage in your BIOS to 1,85 Volt (or connect all L7 bridges).
Here's a screenshot of my test with 1,85 Volt:
And if that's still not enough for your CPU you could solder a smaller
resistance value but the risk
to destroy the processor is very high.
Pay attention to the CPU temperature after increasing
the Vcore !!!
All pictures copyright 2001 of www.ocinside.de
!
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