Do I need more RAM or a graphics card?

Long story short… I use Excel and need to copy/paste a very large data page over to new Excel file each day. The data has gotten so large that it will only let me if I reboot my computer 1st. I have an older computer with no dedicated graphics card and have upgraded to 8G RAM. Computer is Lenovo H420 IPPG620 2.6 CPU… Not really ready to upgrade to new computer yet… Thanks

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