Recently I updated my graphics card. After that, I was facing very slow computer problem because my computer has only 2 GB RAM. So I added more 4 GB on my computer. But still facing the same issue. Should I add more RAM or need to upgrade another component? For more clarification, I added this one: https://www.startech.com.bd/geil-4gb-1600mhz-ddr3-desktop-ram