I put together a HTPC and it turns out, the integrated APU is not powerful enough to play Blu-Ray's or stream Netflix. I need to replace the entire motherboard/CPU (components are soldered together) or add dedicated video card.
I found a graphics card that I think will suit my needs but the minimum recommended PSU size is 300W. The PSU I'm using is 250W.
What kind of problems will I run in to with the graphics card if it's not getting enough power? The only other devices I have connected are a Blu-Ray drive and a 3.5" 7200 RPM SATA hard drive.