I currently have an 256MB ATI Radeon® X1300 Pro card in my dell optiplex 740. I'm looking to turn this computer into my HTPC. I need to upgrade the card to one that has a HDMI output. Will this one work: ASUS AMD Radeon HD 5450 SILENT Series with 0dB Thermal Solution and 1 GB Memory Video Card EAH5450 SILENT/DI/1GD3(LP). I know some of the video cards need power ran to it, and currently the card I have doesn't have an additional power running to it.