your computer is equiped with two type fo different chips, one with temporary the other permanent, the temporary is called RAM (Random Access Memory), the permanent is called ROM (Read Only Memory).

the Random Access Memory (RAM) is the type that could be replaced, you can go to any software store nd buy it right off the shelf, the functions of the RAM chip is to save information for a certain amount of time until you have saved it on the ROM (Read Only Memory) which saves information permanently

if you have anymore question about ROM or Ram you can contact me at [email protected]