Hello, I have decided to purchase a Gigabyte Radeon HD 4650 Graphics Card from Amazon (URL: http://www.amazon.co.uk/dp/B001Q7MW2A/ref=asc_df_B001Q7MW2A573438?smid=A17AS5ETPMZ9A1&tag=kelkmpcpc-2nd-ce-21&linkCode=asn&creative=7974&creativeASIN=B001Q7MW2A). I have researched it but cannot find the wattage this card requires, can you please firstly tell me if this card is worth the price and what the wattage is to run it. Thank you.