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It's very easy to increase the Vcore of the Elitegroup
(ECS) Mainboards K7S6A, K7S5A, K7VZA and K7AMA
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 !
But now let us do the Vcore mod ...
On the upper called Elitegroup Mainboards are the Semiconductor KA7500B
SMPS Controller as the voltage
regulator, whereby of course it's possible to mod this IC a little bit
;-)
We just have to solder a resistor between Pin 1 and Pin 7 and fool so
an incorrect voltage to cause a compensation
of the Core voltage.
In my tests i've used a normal 1/4 wattage resistor with 17 K.
Here you can see the positions where we have to solder the resistor
to:
In the upper picture i've marked the soldering points with two red points.
You shouldn'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 check
if there's no tin at a wrong place !!!
Now put adhesive tape or a small piece of heat shrink sleeve over the
resistor that it's impossible to get
a connection with the case or other components.
After this small modification your Vcore should be 0,15
Volt higher than you've selected in your bios.
That means if you select a Vcore of 1,6 V the real ! Vcore is 1,75 Volt
and with a selection of 1,75 V
you'll get 1,90 V Core voltage.
And if you set the voltage in your BIOS to 1,85 Volt or close the L7
(or L11) bridge,
you'll get a nice Vcore of 2,00 Volt.
Whereby the voltage could diversify a little bit caused by the Power Supply
Unit or by the used power transistors.
And if that's still not enough for your CPU you could solder a smaller
resistance value to the shown places,
but the risk to destroy the processor is much higher, so keep watching
the CPU temperature very well after
each Vcore increasement !
I think that you also don't like boring colour tables to find out the
requested resistor colours for the desired Vcore,
so i've made an interactive resistor where you can select the Vcore and
get the right resistor value with the
colours of this resistor ;-)
The resistor tolerance is optional.
Or use a variable resistor with 50 K, solder it in a row to a 7 K resistor
to prevent lower resistor values
than 7 K and solder this to the two red points as shown in the picture
above.
Pay attention to the CPU temperature after increasing
the Vcore !!!
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