I want to change the fan on my computer. It's really loud and probably not the best fan ever. I want one that is quiet (doesn't have to be super quiet, I think anything will be less noisy than this one) yet still can suck/blow air (whatever they do). It also has to be pretty cheap. Can I just remove the old fan and replace with the new fan? I've thought about replacing the CPU's fan as well but I've heard things about having to be real careful when doing it with a AMD, or maybe that was just the heatsink. If I could change that fan easily as well, I will do it too. Any advice/links will be appreciated. My computer is a HP pavilion 7935. Thanks.