If you installed 4GB and Windows is reporting that you have 3GB or less, it is typically due to the fact that you have a 32 bit version of Windows installed. 32 bit versions of Windows can only address 3GB of memory. You will have to upgrade your operating system to a 64 bit version. If your laptop is not detecting it at all, i.e. does not even appear in the bios setup utility, then most likely you have exceeded the maximum amount of ram supported by your hardware. If not, the next most likely cause is a faulty memory module. Try another memory module.
Quando isso acontecer, você poderá ver um gráfico da reputação que ele adquiriu ao longo do tempo.
Aqui está uma prévia de como será o gráfico:
Nenhuma reputação adquirida ainda.