Ok. Some are saying that even if we have powered risers we have to connect the 4 pin molex...
I will try your way and O hope that I will not get any trouble...
Its like
CryptoWatcher420 said, as long as you are using powered risers you should be fine. But if you are not using them, in that case you should plug in that 4pin molex. I don't have that board, but I have done some research, and I can confirm that the information you got are correct.