[App_rpt-users] Atom

[Ken]

I imagine that the thermal problems with Atom are mostly in fan-less installations.

I did some measurements last night.  With the two little fans running in the Morex 5677, the hottest hot spot in the air discharge is 18 degrees warmer than the room air (72 F in and 85-90 F out). 

This is with the D510mo running ACID and two fobs in operation. Total power into the box measures 19.5 watts including power supply losses.

So - the heat sink is being exposed to air that averages about 9 degrees warmer than room temperature, at the nominal operating conditions.

Except for the output grill, the box feels cool to the touch. I think this should be quite a happy arrangement.

I will try to install lm-sensor / coretemp, or whatever, and see what the CPU reports as its internal operating temperature ...

Ken


PS - Stopping Asterisk reduces power consumption by 0.65 watts.


-----Original Message-----
From: Jim Duuuude <telesistant at hotmail.com>
To: ke2n at cs.com; app_rpt mailing list <app_rpt-users at qrvc.com>
Sent: Mon, Aug 2, 2010 11:15 am
Subject: RE: [App_rpt-users] Atom


I seriously doubt that a Morex 5677 (which is a NICE case for a normal, reasonable
motherboard) would EVER even come CLOSE to the thermal requirements necessary
for long-term reliable service from a D410/D510 board.

JIM


From: ke2n at cs.com
To: app_rpt-users at qrvc.com
Date: Sun, 1 Aug 2010 20:50:54 -0400
Subject: [App_rpt-users] Atom


I have two D510MO running the Centos ACID install – seems to work OK.  The ‘510s are in Morex 5677 boxes with SSD’s and power supplies from 12 VDC.
 
I noticed two things:
 
It seems like the fans want to run at the boot-up speed (default=50%).  With the BIOS at the default value, the box gets warm to the touch.  If you go into the BIOS and select 100% speed for the fans, the box runs nice and cool. I do not know if the fan would speed up eventually when things get hot – but why wait for that? These are very quiet fans even at full speed.
 
The P/S In the Morex box is arranged so that the big 20-pin plug largely obstructs one of the fans.  Since it is an exhaust fan, maybe this does not matter much. But it is really easy to rotate the P/S board 180 degrees and this seems to result in less obstruction of the fans.  Final touch is to put some black tape on the vent holes next to the fans so that most of the air has to come from the other side of the box, rather than taking a short cut.
 
Ken 
KE2N

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