BrianJHoskins wrote:
As I understand it, all CPUs slow down a little when they get hot, it's something to do with Electrons not being able to travel quite as fast once the medium is hot, or something. It's a vauge memory of something I was once told in a Microprocessor lesson. The CPU slow-down is of course quite small.
I have a total of 6 fans running in my A1200 system. Everything runs cool as a cucumber in there, and it's not actually that loud. You need to shop around for decent fans 
Brian
6 fans?!?
It seems that you don`t have optimal casing for your A1.2k. Oh, otherwise you may have PPC+BVision:) and veeery hot hdd:)). My system (A1240T) uses ONE FAN (driven by a thermistor), fitted on a CPU. I measured total power consumption and noticed that it`s about 60-70Watts, so I removed noisy fan from PSU. I checked how long it takes the 040 to overheat and noticed that it must work for at least 5 hours to overheat (DigiBoosterPro with 10CH mod on HiFi stereo 14bit: 33kHz, tested on August this year, with 28C outdoor). Before it crashed due to overheat, I haven`t noticed any reasonable slowdown. Maybe it`s like you say about those Electrons, only. So I decided to leave only one fan, controlled by the CPU temperature. The computer is so quiet I can`t hear it when I stand in the door of my room (2m away:), especially after replacing rather noisy Caviar with Seagate Barracuda...
