So, my custom PC has the Cooler Master HAF 912, right? Well I noticed that every now and then, one of the fans makes an occasional squeaking sound (almost chirping like sounds), and I figured one or maybe a couple of the fans need to be replaced, I don't know. The case support the following fans Front: 2 x 120mm fan, 1200 RPM, 17 dBA (one is optional sold separately, can be swapped for one 200mm fan) Top: 2 x 120mm fan or 1 x 200mm fan (optional, sold separately) Rear: 1 x 120mm fan, 1200 RPM, 17 dBA Side: 1 x 120 / 140mm fan (optional, sold separately) I currently don't have any of the optional fans, so far the only fans I have are in the front, the back, in the PSU, the CPU cooler and video card. I used to have a 200 mm fan on top, but that didn't work out too well because the grill atop the case got bent somewhat and the fan would grind against it, so I was forced to remove it, but I still have it in my room somewhere. What do you think I should do as far as replacing fans is concerned? I've been looking on Amazon (since I have a gift card with 25 dollars of credit), I figured since fans are so reasonably priced, I figured, why not? 120 mm fan for the front intake http://tinyurl.com/hleuvoa 200 mm fan (no idea how that can possible fit in the front of the case as per product description, no idea how to take that front face plate off either) http://tinyurl.com/hbhzohb 140 mm fan, which can somehow fit in the side panel where those holes are, no idea how they would mount or if any of these additional fans would adversely affect the airflow http://tinyurl.com/hasf9hj So to sum up, I can in theory have a total of six case fans, which might be overkill, but either way, I know the fan in front for sure needs to be replaced, just have no idea how to actually swap it out because I'd have to remove that face plate somehow.