I recently purchased an Arctic Cooler Freezer Pro 7 for my Asus P5K Deluxe (running Intel Q6600). It's not extremely loud, but not extremely quiet either.. was spinning around 2600 RPM. Upon browsing around in BIOS, I located an Asus feature called 'Q-Fan Control' which allows you to enable different 'profiles' for your fans. The options for CPU fan are Silent (very low RPM), Optimal (middle RPM?) and Performance (RPM based on current usage needs). So basically, I enabled Q-Fan Control and chose 'Performance' and my PC is now nice and silent! But in doing so I discovered that my CPU fan RPM is also now around 900, give or take about 50. Now I am NOT a gamer nor do I run many resource-hungry applications. At most given times, I am just browsing several websites, downloading (lots of) music and/or running a few non-intensive programs. So... is it unwise to enable Q-Fan Control on Performance Mode? Would it be best to keep my fan running at it's full 2600 RPM at all times regardless of what I'm doing? And.. is 900 RPM too low and thus potentially dangerous for my components? Thanks for any input! Edit: Oh yea, one more important tidbit.. Q6600 is NOT overclocked.