I have an older computer, which is a Dell inspiron 660, wondering if it's possible to upgrade the graphics card.
I know it has a 300W power supply. I can give additional info if needed. Thanks for any help.
Most likely yes, with the GTX 1050 or 1050ti being the recommend GPUS. They have low power consumption, most do not require the 6 Pin PSU cable that many prebuilts don't have, and are available in Small Form Factor is you have a slim profile PC Case.