Advertisements I would never mean to imply that people shouldn't test, and share their results. But others (like me) *have* observed significant (~10C) reductions with the XS-2 fan. So the fact that your new fan didn't help with temperatures doesn't mean that they can't. In the same way that my results don't guarantee 10C-lower for anyone else. Admittedly, I changed my HD at the same time, but the replacement supposedly draws more power than the stock drive, so it should actually make things worse, not better. A new fan is not a guarantee of lower temps, it seems, but at the same time, it *may* help. FWIW, my stock fan is very quiet (and yes, it was spinning), but my unit ran rather warm with it. Some people have reported noisy stock fans, but cooler temps, I think. Perhaps the noisy fans aren't just out of balance, or similar. Maybe they are spinning faster, or are otherwise more effective?