Just got one and it has an extra requirement, so it needs to be hooked up to a 4 pin connector.
With this card installed (extra power enabled), 7 times out of 10, I can't even post.
With this card installed (without extra power enabled), 7 times out of 10, it won't post, 2 times out of 10, it will post, but when it searches for IDE devices, it freezes.
I have a 500 watt PSU. I don't see how this card is using so much that the other components aren't getting enough.