What graphics card would be good for a computer for Instagram?

rtx 3090. very important to have a good gpu for insta, need the photots to look good

You don't really need to worry all that much about your graphics card, if it's stuff like photo editing and video production you are aiming for your better off getting a relatively low end graphics card but getting good ram, memory and a good cpu

TROLL ALERT!!!!!! or just someone really really stupid

The graphic card has nothing to do with how you look on Instagram.  The quality of the picture is going to be determined by the quality of the camera you use to record.   

All the graphic card does is showing the finished product on your monitor or screen.  the camera determines how "beautiful" the recording is.

Many of the professionals use stand alone cameras and record separate from their computer, and then transfer the video over to their computer to be posted.  They do not record using the computer.

High quality phones are also often used for video that is taken on the move.  And then it is transferred to a computer to be posted.

A graphics card only is for displaying on your computer. It has zero to do how you look on instagram.

The camera, the ability of the photographer and if course the subject is what makes a photo.

You can't make a silk purse from a sow's ear.

When it comes to photos the software and your artistry in using it is where the magic happens, your choice of hardware only makes the work go faster. Start with a full HD display for best viewing, and plenty of RAM because if the system has to resort to using the hard disk to pretend it has enough it can be very slow going.