My asus 87u is very hot

hi all My Asus 87u is very very hot when i touch it on the top of it... skould it be really hot that way ?

tthe temps are on that file.. im not sure is that normal ?

Cazzoi said:

hi all My Asus 87u is very very hot when i touch it on the top of it... skould it be really hot that way ?

tthe temps are on that file.. im not sure is that normal ?

Click to expand...

To hot move that router or get a fan going on that thing. CPU 93 and 5 GHZ radio in the 70's is just to hot.

You are almost reaching the QTN Chip (5GHZ) max temperature (TJMAX 90º), bad seated heatsinks/heatpads and once again BAD quality control from ASUS

My NEW RT-AC87U MAX temperatures so far are 47º/55º/76º and we are at summer time, very similar to my old RT-AC87U sent to RMA.

Send it back or wait for RMA

hggomes said:

You are almost reaching the QTN Chip (5GHZ) max temperature (75º) , bad seated heatsinks/heatpads and once again BAD quality control from ASUS

Click to expand...

Actually seeing that both his chips are having unusually high temperatures, I wonder if it's not something specific to his environment, such as insufficient airflow in the router's location.

I suggest trying to elevate the router a bit by putting something under its four corners so more airflow can move underneath the router, and ensuring there's sufficient airflow in its general location. If it doesn't help, you might need to go with active cooling to ensure better stability.

Don't think so, 2.4GHZ radio temperature seems perfectly fine compared to the other two (5GHZ radio and CPU)

Active cooling its non-sense on any router, they shouldnt reach those temperatures out of the box.

I've seen the same scenario with my RT-AC68U and i have it working now with less 20º after reseat heatpads/heatsinks and i was forced to loose warranty because of it (i open it), ASUS should make better they're "home work" thats what it is, BAD QUALITY CONTROL.

what the best way to lower temp it right beside me

just putted my asus ovr top of a book

i have two 87u and both have same temp. 47 / 72 / 82 (5GHz is disabled), so i think that this temp is ok, except cpu. temp. 93 is to high or enviroment temp is also high.

Cazzoi said:

what the best way to lower temp it right beside me

just putted my asus ovr top of a book

Click to expand...

Hi,
How is your room temp. where the router is located? Room air has to circulate to take the heat away from router. My indoor temperature is maintained at 22.5C year round with good exchange for outdoor fresh air. One time I was running 3 routers side by side, Netgear R7500, ASUS RT-AC87U, Linksys EA8500. ASUS was running hotter than the other two. 90C is really hot. You may need an active cooling to keep it down as much as you can. I'd try 4 pop bottle plastic caps under 4 corners of router to improve venting. If this does not help much, you'll need active cooling. Good luck.

My approach is to put one pair in the following fan notebook cooler, you can try

Cazzoi said:

hi all My Asus 87u is very very hot when i touch it on the top of it... skould it be really hot that way ?

tthe temps are on that file.. im not sure is that normal ?

Click to expand...

You may want to view this thread on what others are doing to cool their set http://www.snbforums.com/threads/rt-ac87u-r-cooling-solutions.24888/

hggomes said:

Don't think so, 2.4GHZ radio temperature seems perfectly fine compared to the other two (5GHZ radio and CPU)

Active cooling its non-sense on any router, they shouldnt reach those temperatures out of the box.

I've seen the same scenario with my RT-AC68U and i have it working now with less 20º after reseat heatpads/heatsinks and i was forced to loose warranty because of it (i open it), ASUS should make better they're "home work" thats what it is, BAD QUALITY CONTROL.

Click to expand...

IMO, Heat pad is insulator not a good heat conductor. I noticed RT-AC87U uses heat pad, when I tried to remove it and apply paste, HS mounting spring loaded pegs became too long not giving good solid contact between HS and chip. Here I gave up the idea.

I think Asus has made stupid mistakes in designing this router --

It doesn't allow proper air-flow constitutes inside temperature rise.
It should have a fan inside
Using heat pad - silly?

The high temperature makes the router unstable. The 5GHz band is unstable anyways. They can't fix the basic stuff let alone what it would be with 11ac clients and MU-MIMO enabled.

If you can get the refund or sue Asus for selling the crap. Those Tawain based companies needs to stop making such crap and make money out of it.

My RT-AC87U has only been running for a couple weeks and I like to share a little experience in this topic.


First off, my router sits on a wooden shelf with good general ventilation in its vicinity. Under general normal usage (and even when it is idling) , its top surface feels hot. So, I decide to add a little active cooling. I do understand that my hand being uncomfortable does not mean the router chipsets are unhappy. I do know their TJMax are 90C+. So, this mainly provides psychological benefit. I know someone is going to laugh at me about active cooling a router but as this gives an extra peace of mind, why not?


The pic shows that the 3 heatsinks on the top of the PCB are aligned with their fins running East-West direction. So, it is best to provide airflow (green arrows in the pic) in this direction. Asus, of course, has provided vent openings on the left and right sides of the router plastic cover. Therefore, I have placed an 4'' USB fan (cheap one, costing US$3. Spending $3 on a $200 equipment is well worth it) blowing air horizontally across the width of the router (ie W-E direction). With the fan in place, the router top surface now feels only slightly warm over the CPU area.
( I see that the new RT-AC88U is going to have a little fan over the CPU heatsink.)


Unfortunately, I have no temperature numbers to give because I am using Asus' firmware which displays no such readings.


I have read that some owners claim using a laptop cooling pad also gives good result (eg 20C drop in temperature). I note that there are also vent openings on the bottom of the router. However, air entering the 2 opening areas will likely to exit through the side vents, after cooling the bottom of the PCB. So, in theory, this should not be as effective as an airflow flowing across the top side of the PCB, cooling the 3 heatsinks directly.

My router is sitting right next to the centralized AC vent, it's running cool.

Dedicated 24h/24H AC?

hggomes said:

Dedicated 24h/24H AC?

Click to expand...

yes

I flipped mine upside down.

Probably not a bad idea.

GhostriderZ85 said:

yes

Click to expand...

That will result in good temperatures but quite expensive monthly.

I now have some thermal numbers as I have switched to Merlin's.

Without fan: 47/64/85
With fan: 41/50/62
(Ambient temp = 30C)

I will fine-tune this by varying the fan' s position and angle. I suspect positioning it to the right side of the router might yield an even lower number for the CPU which sits on the right side of the PCB.