I added positive feedback too soon. Received fan, connected, and wondering why it is so loud. Start to carefully inspect and... seen that fan is not new but USED! If you look at the pictures, you will see that inside is DIRT! Especially in narrow places, apparently, it wasn't easy to cleanout. And if you will look very carefully at the pictures, you also will see that fan was screwed and in the holes visible thread from the screws. Considering the previously mentioned, I am not sure that the fan is counterfeit with new labels (labels are new!).
havent used yet.and i have no knowledge to check if it is original.but best price and looks normal.thanks