AOpen AK73 Pro (A) VCORE MOD

It’s very easy to increase the Vcore of AOpen AK73 Pro (A) 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 AK73 Pro (A) 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:

solder a resistor from Pin 7 to GND

In the enlargement i’ve marked the two easiest positions with red points. 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 !!!

If everything is soldered it should look like this picture:

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:

My CPU should get Volt more

Pay attention to the CPU temperature after increasing the Vcore !!!

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