I have a unreliable FX3400 video card in a Celsius R630 computer and need to replace or was hoping to upgrade. I tried a Nvidea base GTX430 card but computer locks up at before bios just shows the fujistsu siemens logo. What is an affordable solution for a new video card that will work on this computer and give a better video solution. I am running 64bit windows 7 ultimate as the OS. Any advice applying to this would help.