katevazeis teleutaious nvidia drivers apo dw:
http://www.nvidia.co.uk/Download/Find.aspx?lang=en-uk (epilegeis th karta sou apo aristera -500m series, 540m)
Uninstall tous prohgoumenous drivers, restart, install autous, restart
An den doulepsei auto dokimase auta, gia na kaneis force thn nvidia karta (mporeis apla na allakseis ta power options gia to pluged in an thes na xrhsimopoiei thn onboard otan den exeis reuma):
Set "battery's power option" in control panel to high performance
In Nvidia Control Panel , tick "Let the 3D application decide" and select "high performance Nvidia processor"