Soldering is kid stuff. Do not frighten him. A good soldering station Ersa, Weller -> 80-150W) and the thing is outside. It is more important which value should be clean again. Maybe you look for pictures from the graphics card -> reference design and it looks like Potent was the original -> Dimension. It could possibly only be a 100nF-16V (25V). Maybe you look for the chip (CODE), where this capacitor belongs. Just a few suggestions ...