Hi, I am new to this, so please bear with me. I want to run 3 monitors using an ASUS CM5571 computer running Windows 7, 8 gig of ram and with a 300 watt power supply. The monitors will display text, charts, and tables. I do not do gaming. I would like to use the AMD ATI 5450 Graphics card with 512mb, and with DisplayPort, VGA, and DVI ports. As I do not have a monitor with a DisplayPort, I realise that an active adapter is required to convert the DisplayPort output to VGA or DIV. A 400 watt power supply is recommended for the ATI 5450. Would like to know if my proposed setup will work and if the 300 watt power supply is adequate. Thanks