"Intel Core Duo" 3.4 Ghz is faster than "Pentium 4" 7.2 Ghz

Overclocking Intel Core Duo T2600 (2.16 GHz) to 3.4 GHz, it said that the Pentium 4 which is the world's fastest record of the world overclocked to 7.2 GHz. It's exactly twice.

For this reason, roughly speaking, it seems that Core Duo seems to have about a double the performance of P4. If you are planning to change from the machine you currently own, why not consider taking this into consideration?
Madshrimps News: Intel Duo Core clocked at 3.4 Ghz beats P 4 overclock to 7.2 Ghz!

After that, if you use this area, it is still satisfactory to know how much you are profitable by comparing the current CPU with the CPU of the planned purchase machine with various benchmark results, and how much it will be strengthened.

GIGAZINE - CPU benchmark comparison chart 2005/2006 edition
http://gigazine.net/news/20060406_cpu2005_2006/

However, it seems that Intel Core Duo has not been added yet ... sorry.