@tweakboy
I suggest you re-read the OP's posts.
OP wants a video card compatible with 3D render/modelling and digital compositing NOT playing BF3.
fwiw: A 9800GT/8800GT would likely require a power budget outside the OP's present PSU's capability- as I assume that the power supply is of the same vintage as the system. The 9800GT also can be more problematic ( high Pb solder), run hotter, less effective in GPU acceleration, and are more often than not found with only a 512MB frame buffer which is insufficient for the software the OP is using.