Other, similar capacitors, may have failed, but not as obviously as the two you replaced. Look for a couple more caps with the same uF value and voltage as the ones you replaced. Those caps might be bad. Same or higher voltage rating is usually ok for a replacement cap.
Watch the polarity, and don't swap the positive and negative wires around when you replace caps.
GeForce 2-TI came back to life when four bad caps were replaced two years ago. Took the replacement caps from a dead motherboard. Switching power circuits often have special, high quality, low ESR caps (equivalent series resistance). For me, this is a hobby. It didn't cost anything but a little time to fix that card, but as others point out, don't spend too much money fixing such an old card.