The way it was explained to me was, a GPU may last 8 years or so... overclocking it may make it last 4-5 years... I guess it depends on how long you plan to keep your lappy...
I turn on Vsync and it stops it for a while.. but it reappears...? If it was a card problem or overheating wouldnt the tearing continue, or is tearing a oc issue??