AX86U constantly running at 85°C+

[nyc5gadvocate]

The majority of AX86U owners posted CPU temperatures much lower than what I see with my device: https://www.snbforums.com/threads/ax86u-thermals.79880/. After seeing this, I'm interested to know what could be causing the higher than normal temperatures with mine. What should I check or change?

Current Temperatures 2.4 GHz: 50°C - 5 GHz: 55°C - CPU: 85°C

3x1GbE + 1x2.5GbE devices plugged in; <20 WiFi devices connected directly and through an XD6 AiMesh node; nothing plugged into USB ports. Running the latest Merlin fw.

Top output:
Mem: 436404K used, 497580K free, 2500K shrd, 0K buff, 34204K cached
CPU0: 0.8% usr 2.2% sys 0.0% nic 96.7% idle 0.0% io 0.0% irq 0.2% sirq
CPU1: 0.4% usr 1.8% sys 0.0% nic 97.7% idle 0.0% io 0.0% irq 0.0% sirq
CPU2: 0.0% usr 0.1% sys 0.0% nic 99.8% idle 0.0% io 0.0% irq 0.0% sirq
CPU3: 0.4% usr 1.0% sys 0.0% nic 98.5% idle 0.0% io 0.0% irq 0.0% sirq
Load average: 1.14 1.12 1.09 1/163 26228

PID PPID USER STAT VSZ %VSZ CPU %CPU COMMAND
1684 1 admin S 11220 1.2 0 0.9 httpd -i br0
2576 1 admin S 14108 1.5 0 0.1 cfg_server
1463 1 admin S 12020 1.2 1 0.1 nt_center
1706 1 admin S 12408 1.3 2 0.1 watchdog
345 1 admin S 18532 1.9 3 0.0 /bin/swmdk
1712 1 admin S 12408 1.3 1 0.0 sw_devled

 

[bbunge]

Go back to Asuswrt? Works well for me and my curr_cpuTemp = "70.420"

 

[geobernd]

As per the other thread:
Try placing the router in the intended upright position with nothing blocking airflow and see what the numbers look like.

CPU loads averages are normal - and as you can see it's mostly Idle.

 

[Logi]

I think thermals are very sensible to the room temperature and devices connected to the Ethernet ports, my readings with 78C room temperature and no devices in the x4 LAN ports (using only the 2.5G port, for the backup WAN), are:

2.4G: 46C
5G: 49C
CPU: 66C

 

[L&LD]

54C, 55C, 75C (2.4/5/CPU) on a very hot day with temperatures above 90F, no AC.

RT-AX86U

I would be returning that unit, depending on the ambient temperature where it is used in.

 

[Tech9]

what could be causing the higher than normal temperatures with mine

Most likely higher ambient temperature + 4x LAN ports in use.

AX86U thermals

how are the Thermals in it? one of my AC86U routers kicked the bucket an I'm looking for a new router. I knew I needed to invest in a cooling solution after reading about all these dead routers around here, especially as it gets very hot where I live when the AC is off but I digress.. I'm also...

www.snbforums.com

 

[nyc5gadvocate]

As per the other thread:
Try placing the router in the intended upright position with nothing blocking airflow and see what the numbers look like.

CPU loads averages are normal - and as you can see it's mostly Idle.

Thanks! That helped. From 85 to 78°C

 

[OzarkEdge]

Really? You had your AX86U on its side with air flow restricted?

OE

 

[nyc5gadvocate]

54C, 55C, 75C (2.4/5/CPU) on a very hot day with temperatures above 90F, no AC.

RT-AX86U

I would be returning that unit, depending on the ambient temperature where it is used in.

Unit returned and received replacement. New unit runs at 95°C. Sigh.

Not going to worry about the high temperature anymore.

 

[L&LD]

Are you using it in the upright position? What are the ambient temperatures?

If the first question is yes, and the second is below 30C, I would be returning this one too.

 

[RMerlin]

95C is too high for comfort, as the router will start disabling CPU cores if the temperature hits 100C.

 

[geobernd]

Unit returned and received replacement. New unit runs at 95°C. Sigh.

Not going to worry about the high temperature anymore.

You either have bad luck with these or there is more going on:
Upright?
No obstructions e.g. free standing not enclosed or no a shelf with another shelf over it etc..?