The computer and existing graphics card is great. However, I need more for playing some games like World of Warcraft. So, I need to know can you add additional graphics cards to the slimlines. And which would would be the best of the affordable prices ones.
So no, you can't add a graphics card to your system.
Avoid purchasing slimline computers in the future (they always have limited expandability) and you should be able to find something used that's very fast and has tons of expandability such as the HP Z440, it's my go-to rig for inexpensive gaming builds (as it comes with a monster power supply that can handle all the latest graphics cards).
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".