you can increase tha size of Ram virtually.. that willl help to make your system Faster
For this you just have to follow these steps:-
STEPS:-
1.Hold down the ‘Windows’ Key and Press the ‘Pause/Break’ button at the top right of your keyboard. 
OR Another way is Right-Clicking MY COMPUTER and then select properties.

2. Click on "advance"

3. Under "performance" click SETTING.

4.Then click the ‘Advanced’ tab on the button that pops               
   up.

5. Under ‘Virtual Memory’ at the bottom, click ‘Change’.



6.Click the ‘Custom Size’ button.

7. For the initial size (depending on your HD space), type in anywhere from 1000-1500.

8. Click ‘Set’, and then exit out of all of the windows.


9. Restart your computer.