In order for the sound card to receive power from the sound card, there was a 3 pin connector and a short wire which turned into a 4 pin molex connector. This had to be plugged into A molex socket with 4 holes, which led to the PSU.
OK, understood. My Creative card did not have this separate power connector, hence my question.
As jsc suggests, never connect anything (I don't even like the hot swap feature on hot swappable devices) while the computer is running.
And always wear a grounding strap while working on a computer.