the productivety of my machines have increased hugely since going dual core on both my main machines.Its knocked minuted off dvd ripping and it all adds up.Also as I have posted before my machines are geared towards high productivety when needed with extra hard drives etc so apps can run off seperate hard drives etc. So when I say I would notice the difference im only being honest
BTW the smallest x2 is the 3600 and its AM2 only iirc