On a sunny day (28 Nov 2019 14:26:50 GMT) it happened A. Dumas
 wrote in
:

>Jan Panteltje  wrote:
>> Nice PI4 box:
>>  https://www.ebay.com/itm/223705304329
>>
>> Came with heatsinks for processor and RAM, a fan,
>> and even a screwdriver, arrived in just 10 days.
>>
>> CPU temperature in previous plastic box was around 70 C
>> Now 48 C.
>>
>> Cannot hear the fan.
>>
>> Perhaps RFI screening is better too in this box.
>>  http://panteltje.com/pub/metal_raspi_box_IXIMG_0251.JPG
>
>But what if you need wifi, that's probably damped quite a bit. Looks nice.

A very good point you make there, I am not using WiFi,
so did not even consider that when looking for a box.
This raspi is recording 6 security cameras, optional one E2500 webcam for
inhouse,
an USB audio stick for record,
has a 4TB Hitachi harddisk connected via an USB hub for storage,
a Cynergy USB DVB-S2 satellite tuner
an RTL-SDR stick for reception of my outside weather sensor
or as spectrum analyzer, or whatever else uses radio.
Been now up for more than a week in that configuration that (2 weeks already?)
and so far works perfectly, very happy with it.

I experimented today by mounting the little fan the other way around so it
blows at the processor from the top
and am now down to 46 C after running an hour in the above configuration,
room temperature is about 21 C,
I did not install any eeprom update as was done in the youtube video you
referred to,
But I think this box it is a good deal, looks nice too.
The raspi is well protected, I do not like those things where the PCB is
reachable from the outside
and pieces of metal could get between it and the case.
It all depends of course, I am very happy with this, if you are a WiFi user it
is maybe not for you.
But I also have a USB wifi stick for my raspi 2 somewhere.. .so there is a way
out.
top:
asks: 199 total,   2 running, 197 sleeping,   0 stopped,   0 zombie
%Cpu(s):  6.4 us,  3.2 sy,  0.6 ni, 89.8 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
MiB Mem :   3906.0 total,    310.8 free,    390.9 used,   3204.4 buff/cache
MiB Swap:    100.0 total,     98.0 free,      2.0 used.   3336.7 avail Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
  683 root      19  -1  164608  50092  31452 S   7.9   1.3  15:29.64 Xorg      
                 X
  896 root      20   0   16300  11332   3420 S   7.0   0.3  12:01.38 mcamip2   
            IP camera1
  898 root      20   0  222148  39732  23904 S   5.6   1.0   9:13.17 ffmpeg    
                   IP camara1 encoding
  900 root      20   0   16300  11480   3576 S   5.6   0.3  10:08.47 mcamip    
                   IP camera2
  901 root      20   0  222120  39628  23892 S   4.0   1.0   7:04.12 ffmpeg    
                   IP camera 2 encoding
 1788 root      25   5   35192  13324   3492 S   2.3   0.3   4:26.76 xgpspc_mon
               display of AIS GPS from other raspi
 1126 root      20   0  148948  31932  24520 S   2.0   0.8   2:49.58 ffmpeg    
                   encoding of that to harddisk
 1125 root      20   0  149180  32236  24608 S   1.7   0.8   2:50.11 ffmpeg    
                   encoding security cam1
 1127 root      20   0  147960  31860  24788 R   1.7   0.8   2:50.89 ffmpeg    
                   encoding security cam2
 1128 root      20   0  149188  32420  24608 S   1.3   0.8   2:49.09 ffmpeg    
                   encoding security cam3
 1191 root      20   0    6576   4232   3808 S   1.3   0.1   2:00.02 xosview
26471 root      20   0    6156   2744   2308 R   1.3   0.1   0:00.08 top
 1892 root      25   5   37424  27068   1988 S   1.0   0.7   1:40.42 rtl_433   
            RTL_SDR radio receiver 433 MHz weather sensor
 2147 root      25   5   44516   4324   3612 S   1.0   0.1   1:26.36 xdipo     
    satellite DVB-S2 receiver transport stream to disk
 1789 root      25   5  185712  35340  25264 S   0.7   0.9   1:32.18 ffmpeg    
    encoding security cam4
 2096 root      20   0   16204   4140   3328 S   0.3   0.1   0:50.21 xmpl      
    mediaplayer

raspi95: ~ # /opt/vc/bin/vcgencmd measure_temp
temp=45.0'C







>I have a Pimoroni "Fanshim" which gives about the same result. New firmware
>also helps a lot. Here is a test of a couple of passive heatsink cases:
>https://youtu.be/VJC6OpGpq0Y


My main worry with active cooling is dust accumulation, but then again I have a
big PC
running 24/7 for years, every now and then I hoover it, get he dust fromn the
CPU cooler and air inlets,,,,

--- SoupGate-Win32 v1.05