FAN installation on PX5

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Pacote-san

Senior Member
Apr 2, 2008
176
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marchnz said:
Ive mentioned it a bunch.
Click to expand...
Click to collapse
I must have missed that, sorry.

Im doing a few tests and using heatsink directly to the SoC + a 24v fan running at 12V Im getting such great results that will test it running at 9v.

12V is silent enough but since with cpu stress (little cores at 1.2Ghz and big at 1.512Ghz) Im getting at most 60c, I think 9v will do just fine, heck probably 7v would work fine. (<80c)

Heatsink alone wasnt cutting if I configured the CPU to run at max speed almost all the time. With default config it would run just fine but the performance difference when you make it run full speed is considerable. (switching between waze and spotify via wheel button is pretty much instant and so on)

Even with the top cover off it would quickly reach > 80c degree and with the top cover on, it would throttle in a few minutes when using CPU stress test.

*ignore the wires soldered to the px5, it was for the DSP mod that I ended up taking it off.

Notice that the 4 little core was not even running at full speed cause I forgot to set it up, so temps would be even worse.

A2lKVze.png



Now after the fan mod

8VceEek.png


0Q9Mdbj.png


Big full speed but forgot to set little cores

hMwDkgI.jpg


Everything at full speed for 4 minutes

VLo9bBh.jpg


I ran the full test a few times and it didnt go over that temp.


Will try it out with 9v later.
 
P

Pacote-san

Senior Member
Apr 2, 2008
176
29
So here is the results running the 24v fan at 9v.

Total silence, cant hear the fan at all when everything is mounted since the 1din is behind the AC controls

This is the temp while idle (40c)

iFshcic.jpg



While using Waze only I get 45c and while using waze and listening to spotify I get 52c *This of course with kernel opened aswell. Im sure without it it would run a few degrees cooler.

REYzPnP.jpg



Running a stress test while using kernel and listening to spotify in the background got me to 77c max

Tn5Zzs4.jpg


When I pause the music I instantly get a 5 degrees drop

BLKuclM.jpg


9zxy0ax.png


The fan and heatsinks I already had laying around here. All I had to do was to cut the heatsinks to size. Just used some Artic Silver knock Off I got and small drops of J-B Weld (quickset) on the corners of SoC and chips.

Huge upgrade for me because running all the cores at full speed make the OS so much faster!
 
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Ahto42

Member
Apr 26, 2016
10
0
But what do to when the CPU is underside the mainboard?
 

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Ahto42

Member
Apr 26, 2016
10
0
I added some folium tape under the cpu with cooling pase. Then added a 80mm vent on top on it, Drilled few holes to the bottom to vent the air out.
I gained like 10c. Before the went, the temp went to 84c. Now it stays 73-74, Added to the cpu test- Youtube vanced, waze ,chrome where on the background
 
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focccus

Member
Dec 14, 2019
10
0
Pacote-san said:
So here is the results running the 24v fan at 9v.

Total silence, cant hear the fan at all when everything is mounted since the 1din is behind the AC controls

This is the temp while idle (40c)

iFshcic.jpg



While using Waze only I get 45c and while using waze and listening to spotify I get 52c *This of course with kernel opened aswell. Im sure without it it would run a few degrees cooler.

REYzPnP.jpg



Running a stress test while using kernel and listening to spotify in the background got me to 77c max

Tn5Zzs4.jpg


When I pause the music I instantly get a 5 degrees drop

BLKuclM.jpg


9zxy0ax.png


The fan and heatsinks I already had laying around here. All I had to do was to cut the heatsinks to size. Just used some Artic Silver knock Off I got and small drops of J-B Weld (quickset) on the corners of SoC and chips.

Huge upgrade for me because running all the cores at full speed make the OS so much faster!
Click to expand...
Click to collapse

What is this test software (in left window)?
 
tranceonline

tranceonline

Senior Member
Aug 30, 2009
137
6
Soooo i did this very bad setup just to test it and this alone dropped the temps from 100° C down to like 75°C!!
Almost 30°C just with a bad small cooler and a big 120 mm Fan on top of it.

I had throtteling to 75% most of the time before.
With this setup, it runs with 91% of the power most of the time.

I will put good thermal pads on top of it and than put a 40mm Cooler with a 400mm Fan on the SoB.
Plus a 120 mm Fan in the top-lid for heat-dissipation.

1650887976651.jpg


1650887998867.jpg
 
A

angelparras

Member
Feb 1, 2014
37
9
I have installed mine today, NOCTUA 60mm fan.

I had to remove the heat sink disipator and make one new hole to fit the fan, after that, i take one fan connector alarguer and soldered it to the main connector in the back of the Main Board, Negative and ACC positive. Everything is perfect now. Also i changed the thermal pads and added Thermal Paste Artic Cooling.

 

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rigattoni

rigattoni

Senior Member
Apr 27, 2010
1,993
640
Fuerth
TBH: I would NOT recommend to mount additional weight onto the board. That´s something for stationary usage, but in the car you have too much shaking and punches on bad roads all over the world. The mounts of the board and the board itself is not constructed to resist this for a long time.

Remove the fan and mount it in the lid of the unit as shown HERE!. It´s much more safe and the cooling is at least better than a directly mounted fan... and of course the Noctuas don´t have a huge air flow.
Remove the thermal pad and use a high quality thermal paste instead, but don´t bring additional weight onto the boards.

A 60mm fan in the mostly open lid in my PX6 keeps the unit bejond 70°C in hot weather. Just now in wintertime it is no more than 50°C even when using the throttling app.
 
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  • 1
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    angelparras
    I have installed mine today, NOCTUA 60mm fan.

    I had to remove the heat sink disipator and make one new hole to fit the fan, after that, i take one fan connector alarguer and soldered it to the main connector in the back of the Main Board, Negative and ACC positive. Everything is perfect now. Also i changed the thermal pads and added Thermal Paste Artic Cooling.

    View
    1
    rigattoni
    rigattoni
    TBH: I would NOT recommend to mount additional weight onto the board. That´s something for stationary usage, but in the car you have too much shaking and punches on bad roads all over the world. The mounts of the board and the board itself is not constructed to resist this for a long time.

    Remove the fan and mount it in the lid of the unit as shown HERE!. It´s much more safe and the cooling is at least better than a directly mounted fan... and of course the Noctuas don´t have a huge air flow.
    Remove the thermal pad and use a high quality thermal paste instead, but don´t bring additional weight onto the boards.

    A 60mm fan in the mostly open lid in my PX6 keeps the unit bejond 70°C in hot weather. Just now in wintertime it is no more than 50°C even when using the throttling app.
    View
  • 5
    I
    IloveJapan
    Hello,

    I've improved the cooling on my PX6. First I've check how Rockchip CPU is link to the radiator: It's a poor quality thermal pad (not correctly centered)

    bopp.jpg


    I've tested if I can use thermal paste instead of thermal pad, but distance from SOC cover to the radiator is to far to be better than pad.

    gen6.jpg


    So I changed original pad to an high quality pad, correctly centered.

    9zve.jpg


    then I installed an Intel CPU radiator over the original one (with thermal paste between the 2 radiators) to improve heat exchange:

    1sqw.jpg


    I was needed to cut lot of fins to be sure to create no interference with other component on the SOM.

    bcbg.jpg


    8p20.jpg


    au2f.jpg


    Fitted in the unit:

    4jak.jpg


    I've tested the modification with several geekbench loops, temperature was 20°C less, but heat seemed to stay inside the unit enclosure. So I tested without top cover and temperature drop again 10°C. So I decided to modify top cover, without installation of a fan, to create a natural airflow.

    o2tn.jpg


    o48s.jpg


    xji4.jpg


    Results are good, now the SOC never throttle, even after 5 loops of geekbench or GFX bench, temperature increase slowly from 45°C (idle) until reaching a maximum of 72°C
    View
    4
    O
    optimvs
    A fan is NOT useless, and to think also.

    Good afternoon all involved,
    at first to say weather condition is important. It not same to use this kind of device in Moscow than in Madrid. Try use a car without fan engine in both places in summer time, you will quick notice the overheating difference. Then cost and quality of material used in the radio/gps device and main design are also important to keep safe of malfunctioning. And rarely these PX5 boards, screens and body cases are state of the art, be default the cheapest possible materials are used.

    Particularly on my device, a PX5 9" screen for Hyundai Kona, I found when outside temperature in Malaga (Spain) reaches +35 Celsius degrees (a nice day can reach +40 at shadow) the screen starts to self-disconnecting randomly, but CPU still alive. Duly noticed the screen cover (made I guess in poor plastic material) came to be untouchable, pain just fingering the screen cover. After one hour, the CPU starts to fail, making some reboot.

    Disassembling the unit, I found some facts. First one, the small design of case, the cooling air convection is ridiculous. Too small air intakes or holes, neither for CPU neither for screen are in safe condition. And moreover I found the screen chips temperature are higher than CPU most time. So the system came in few minutes very hot and unstable, it does not matter the low power consumption, because there is not effective way to cooling in extreme conditions. So any extra cooling system, manual or automatic, passive or active; is NOT useless.

    1. Taken dremel and diamond disc for made a 80mm hole for a classic PC fan. I bought the Tacens Aura II, very quiet specs, only used two pins.
    2. I set an PC molex connector (male and female) to power the fan, so easy for remove the unit, and screwed a PC dust/fan filter over the external case.
    3. The power line for fan is taken from car IGN1 (Hyundai Kona radio connector "B", #33 pink cable +12v) and not from ACC (classic red one), land/mass whatever available. I did not take from ACC because already is taken for supply the radio and screen. If you charge a 3rd device for ACC, the power will fail for some of them. Already tested and confirmed this issue.
    4. Inspected the CPU, retired the original thermal silicone piece and replaced by "Adwits" thermal conductive silicone pads 6.0 W/mk 1.0mm.
    5. Added directly over original PX5 CPU sink; two 50x25x5mm sinks (space with internal fan is adjusted). Directly placed sinks with conductive silicone pads. Then for security, employed "Visbella RTV" silicone hi-temp gasket maker, fixing new sinks to original PX5 sink, avoiding extra screws or weight. I must say this thermal paste has similar behavior and drying to Sikaflex 256 polyurethane car glass adhesive sealant.
    6. Finally at top-back side of screen case, as I saw in another branded gps screens, I made an air exit. In this case, two 30mm holes covered by two black stainless steel air vents. Fixed with common thermic glue silicone. The only convection air dynamics will not allow the internal case temperature will higher than external, moreover with the fan airflow.
    7. Tested during two months. On sunny days, just the minute after leaving the parking area you can feel the hot air canon if you put your hand on the screen back. And driving against the sun, the whole case temperature is a little hot but not burning like before. No fail, not more screen or device shutdown.

    I attached some shoots of whole process.
    If any question/doubt please reply or email me.
    And many thanks for your advice and help in this forum.
    optimvs
    View
    3
    B
    Barreto
    Barreto said:
    Yeah, you guys are prob right. The heatsink is really light, but the vibrations from a moving car could make it bounce a lot and damage the chip...
    I will just replace the thermal pad between the chip and top plate, remount the top plate and attach the heatsinks to this plate.

    I tested temps this weekend, and they were around 80C with music+GoogleMaps. Outside (ambient) temps were around 30C. (under stress was about 95C, but that is not normal use...)
    If it lowers 20C, I'll be happy.

    I will try to post some pics of the procedure when I receive the materials. (it shouldn't be very different from @IloveJapan post, but nevertheless...)
    It should take about 1 month or so...
    Click to expand...
    Click to collapse

    Hi again.
    I modded the HU a while ago but didn't have time to post pics/results.

    I bought 2 heatsinks with thermal adhesive. They are 40x40x30 aluminium pieces. They were suppose to go over the cover/heatplate
    I also bought thermal pads They were supposed to go over the chip, between the chip and the cover/heatplate

    When I was disassembling the HU, I found out that the cover/heatplate was glued to the mainboard. (it also had screws, but it had like 4 points of glue around) I didn't want to risk it being loose or fragile, so my initial thought of replacing the thermal pad was a no-go.

    I just cleaned the top of the heatplate really well with alcohol and stuck 1 heatsink to it, in the center of the plate. Although the heatsinks are really light, I didn't want to risk the plate/board becoming loose with vibrations or bumps, so I just installed 1 instead of 2.

    I'm really happy with the results. The temps came down from 80/90C to 45/50C (30C outside) with regular use (music/GMaps/Streaming TV).

    The HU feels snappier, doesn't hang so much and it doesn't become unresponsive

    If anybody wants an easy and really cheap way to lower your temps, I think this has good results.

    Attaching pictures.
    View
    3
    G
    giouncino
    In my opinion a fan installation is not necessary at all.
    Considering that the PX5 is a SoC with a maximum power consumption of 4.5W, so change the stock metal plate (with its low quality thermal pad underneath) with another bigger one is more than sufficient.
    I'm working in this direction.

    I modified a heatsink from an old AMD CPU to not interfere with the chassis, stuck it on the original metal plate, removed the metal plate and bad quality thermal pad from che cpu, bought and waiting for a new thermal pad (because the original thermal pad is not in direct contact with PX5 so thermal compond only is too thin to reuse the metal plate). Then I'll verify results.

    If not enough I will try to modify another heatsink and put in direct contact with the PX5 SoC. No fan is needed in my opinion.

    Last info: Temperature junction of PX5 is 125°C as written in Rockchip datasheet, so high temps (70-80 under full load) are absolutely normal for this kind of SoC
    View
    2
    wizzsb
    wizzsb
    Hi, so back to the point from the thread title.
    Theres reason to keep lower temperature on any device with CPU as you can really extend lifetime and avoid trootling .
    Specciali for Px5 (any) android headunit which is build into car dashboard wheres can easily be 60°C in hot summer day.
    theres not only CPU whats heating, theres also mosfet amlifier which can dissipate 100W of heat.
    Another point to consider is that if you using animated or 3D background it uses CPU and GPU pretty much and keep it hot.

    So if someone interested theres small "How to"
    I found old 80mm 24V fan which works pretty ok (i put drop of oil on bearing)

    1. mark fan side holes holes, dril the hole and than mark main fan hole on the top part of headunit:
    IMG_1187.jpg


    2. cut the main hole (i used angle grinder + hand grinder) than i clean scorings with instant adhesive glue mixed with sawdust.
    IMG_1195.jpg


    3. To prevent corosion I paint a sheet with black spray.

    4. Solder 2 cables to 3pin socket and on mainboard to switched 12V/GND. (speed signal from fan is not used)
    I used 12V from 78M09 9V voltage regulator and GND from capacitor beside.
    As I have 24V fan - it runs pretty quiet on 12V as it is only 50% speed. If you use 12V fan, you can connect it to output of 78M09 (9V) to low down a speed.
    IMG_1197.jpg


    5. Done
    IMG_1201.jpg
    View

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