Well I´ve to suggest a cooler of a peecee GFX card, IMO is the more adecuated solution for you and it´s no more than 3/4 euro here in Spain.
Butta if you wanna a totally quiet computer you can add a Peltier Cell to the 040.
It works at +12u, so you can power it by the PSU, and if you still using a external PSU with the 1200, it doesn´t get much amperage (twice or 3 times a little 12u GFX fan).
You can add this to the Switching transistor coolers on the PSU, if you are using the 1200 in a power with standart PSU of course, this way you could quit the fan on the PSU (a lot less noise).
Personally, I always make a thermostate that makes start the PSU fan when it´s really needed. STarts at full speed and when low temperature is in the coolers of the PSU, it slowdowns the fan rpms to the 50 per cent for 5 minutes.
Then it shutsdown itself and start the process again
The only way to get a quietter HD is to get it in a ultraquiet HD box :|
Have Fun!
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I can wait to put my hand on the compiler of the Pegasos Developer Board incomming!
