Dual 140mm fans
I bought the biggest, slowest fans I could find at Fry's. There is audible airflow within three feet, can't be perfect. Oh, what a difference it makes! Before the hard drives would cross the painful-to-hold threshold and the CPU sensors would be in the 70-80 C range. Now the hard drives are at a cozy 39 C, and CPUs around the low 40s C.
I've had them powered directly by a Molex connector off the PSU, but this meant I could never turn them off. I'm now trying to run them off of motherboard power to see if they can handle being slowed down and get RPM data. (Also I like the idea of the two adjacent boards suffering at the whim at one.)
Dual 140mm fans
I bought the biggest, slowest fans I could find at Fry's. There is audible airflow within three feet, can't be perfect. Oh, what a difference it makes! Before the hard drives would cross the painful-to-hold threshold and the CPU sensors would be in the 70-80 C range. Now the hard drives are at a cozy 39 C, and CPUs around the low 40s C.
I've had them powered directly by a Molex connector off the PSU, but this meant I could never turn them off. I'm now trying to run them off of motherboard power to see if they can handle being slowed down and get RPM data. (Also I like the idea of the two adjacent boards suffering at the whim at one.)