To get to 1.5v, similar thing. Cut a really small piece of
tape the size of an LGA ‘pin’ Land. Then tape this over the pin marked in the
green square tightly. Also, connect the ‘pins’ shown below with conductive ink,
the ones marked in red.

4  Intel Core 2 Duo Voltage Boost

To get to 1.55v, simply connect the ‘pins’ shown below with
conductive ink, the ones marked in red.

5  Intel Core 2 Duo Voltage Boost

To get to 1.6v, simply connect the ‘pins’ shown below with
conductive ink, the ones marked in red.

1  Intel Core 2 Duo Voltage Boost

If you want to clean off the mods or any mistakes, simply use nail varnish remover or Zippo lighter fluid and clean off easily!

For those who want to check CPU Core Voltages to verify the
increase, just in case your motherboard does not support voltage read outs,
you can check with a multimeter on the MOSFET legs right beside the LGA socket,
such as this:

vm4  Intel Core 2 Duo Voltage Boost

Vcore Measurement on ASRock ConRoeXFire-eSATA2 Motherboard

*For those with 1.2875v Default voltage, head on to the next page for the mods. The Default Voltage is usually listed on the Retail CPU Package Box.