First, you seem to have posted your message twice. Please do not do this, since it then makes it difficult for any responders to know to which thread they should reply. Hence I have hidden the other post.
However, there is a more fundamental problem with your post: we really do not know what you are asking about! We may assume you need, apparently, to purchase a graphics card for your computer? If so, why are you asking the question here? If you need one, go ahead and purchase one!
If you are asking for advice as to which make, model etc. you need then we need a lot more information from you. Please read this post and give us all the information requested there. Without it, we would be "working blind", possibly offering advice which could prove detrimental to the operation of your computer.