I am building a computer for trading stocks but I am new to custom computers. The only real major requirement is being able to run multiple screens 4+. I do not game so there is not really a need for high graphics. Most of the graphics are just charts and graphs. I would like it to be reasonably fast but am on a tight budget. As I said its not actually for gaming but I need to be able to efficiently run 4+ screens at once. How many watts of power should my PSU be? What kind of graphics card or cards should I buy? Hard drive, processor, I need to know all that. Thanks in advance!