Mohammedimran :
RobCrezz :
You need 2x 4gb DDR 667 or 800mhz to upgrade it to 8gb.
Thanks for you reply as i am doing for the first time may i know just by removing the ram i am i going to loose some data from my computer as I did not backup my computer ?
Ram is not storage. Ram is volatile memory, its wiped every time the computer is powered off. So no, you wont lose anything by replacing your ram.
https://en.wikipedia.org/wiki/Volatile_memory
Obviously, only replace the ram when the computer is off, and disconnected from the power.