Hi Ananda,

An architecture student should use graphic card because in architecture field you will be required to make 3-D illustrations and building prototypes, so that a graphic card oriented work as you require better colours and better visual performance. You could use a 4 GB graphic card of nVIDIA or any other company, that will be sufficient for your work.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!