Question about MSI MPG Sekira 500X

Hello everyone, I bought this case some time ago. After I had a power failure in the house, some fans stopped working and the upper ones made strange noises. So I sent it back under warranty and got the same one back. Now that I have reinstalled everything, I notice that the top fans are still making a rattling noise? Is this normal for this case to be so loud I wonder or should I send it back? Thanks for feedback Kind regards exilver