Two of the heatsink fans off & resting on the crossbar at a downward angle. (ill do the other 2 later)
Yeah, great idea!
(Don't do it in an earthquake region!)
Here is my setup. I removed that external case for the fans.
The results are great. The BertMod (modified ASCII script) reported temperatures dropped by 4-5C:
Old setup (with two additional fans on the side, one on top):
Board 0: Temperature sensor: 40.5C
DIE 0 ON: 48 OFF: 0 100% OK
DIE 1 ON: 48 OFF: 0 100% OK
DIE 2 ON: 48 OFF: 0 100% OK
DIE 3 ON: 48 OFF: 0 100% OK
Board 3: Temperature sensor: 40.5C
DIE 0 ON: 48 OFF: 0 100% OK
DIE 1 ON: 48 OFF: 0 100% OK
DIE 2 ON: 48 OFF: 0 100% OK
DIE 3 ON: 48 OFF: 0 100% OK
Modified Board 3 (the right one looking from the BBB):
Board 0: Temperature sensor: 41.0C
DIE 0 ON: 48 OFF: 0 100% OK
DIE 1 ON: 48 OFF: 0 100% OK
DIE 2 ON: 48 OFF: 0 100% OK
DIE 3 ON: 48 OFF: 0 100% OK
Board 3: Temperature sensor:
37.5C DIE 0 ON: 48 OFF: 0 100% OK
DIE 1 ON: 48 OFF: 0 100% OK
DIE 2 ON: 48 OFF: 0 100% OK
DIE 3 ON: 48 OFF: 0 100% OK
Modified Board 0 as well and waited 10 minutes:
Board 0: Temperature sensor:
36.5C DIE 0 ON: 48 OFF: 0 100% OK
DIE 1 ON: 48 OFF: 0 100% OK
DIE 2 ON: 48 OFF: 0 100% OK
DIE 3 ON: 48 OFF: 0 100% OK
Board 3: Temperature sensor:
36.0C DIE 0 ON: 48 OFF: 0 100% OK
DIE 1 ON: 48 OFF: 0 100% OK
DIE 2 ON: 48 OFF: 0 100% OK
DIE 3 ON: 48 OFF: 0 100% OK
This setup also cools the VRMs much better. I had two ones (same location, see picture!) with a temperature of
51-52C. Those are now at about 47C. The only side effect is, that the heatsink is getting warmer. But - it's designed
for that. See the infrared thermometer measurements on the picture.
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fs23.postimg.org%2Ffi2kq5plj%2FSaturn_Cooling_v4a.jpg&t=665&c=7e3utygV91LDFg)
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fs17.postimg.org%2Fmpj2had3f%2FSaturn_Cooling_v4.jpg&t=665&c=q0YkWulPRYtt-w)
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fs17.postimg.org%2Fp9epbe0nf%2FSaturn_Cooling_c.jpg&t=665&c=r2AYOQJaKzZgsQ)
No temperature reading for the 4th VRM, sorry!
Update: I just noticed that the power usage did go up from about 278W to 282W. Maybe it's running faster
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
trepex