Different Temp readings?

[Gargone77]

I build my current system a few months ago, super budget build.  All is working great, better than expected, but I have some temp readings that I'm curious about.

First, the parts:

Asus M5A97 R2.0

FX 8320 w/ Corsair A50 cooler

XFX Radeon HD 7850 w/ Accelero Mono Plus cooler

16GB Kingston HyperX DDR3 1333

Zalman Z3 Plus case

 

The Asus software is reporting much higher temps than something like HWiNFO64 shows for the CPU.  I guess it's the mobo sensor vs. what the CPU is reporting.  For example, under 6 core F@H load, CPU reports a steady, and happy 50C, but the mobo is reporting 63C.  If I run folding on 8 cores, or run Prime95 to torture the CPU, the cores only get a few degrees hotter, but the mobo quickly heats up beyond 70C, popping a warning on the screen.  Should I be concerned over this reading?  Everything is stable, 24/7, plays WoW or Gears 4 with no issues.  I just can't seem to find a definitive answer about how important that mobo reading is.

 

Thanks!

[W-L]

9 minutes ago, Gargone77 said:

-SNIP-

For the old AMD CPU's they shouldn't really exceed 80C and will start throttling just before that, as for different temp readings that not uncommon especially if they are taking it from the Core vs package or board itself. 

[Gargone77]

So, I shouldn't worry looking at these temps after 3-4 hours of load?

[W-L]

Just now, Gargone77 said:

So, I shouldn't worry looking at these temps after 3-4 hours of load?

The important one should be core temps but there are cases where there are bad sensors and they give in accurate readings, and it seems like quite a difference in this case between the board CPU and Core temps so it's very possible that is occurring. 

[Gargone77]

I forgot to mention, the first time I noticed this, I took the back panel off, and noticed almost immediate drop in temps, then I gently blew some compressed air across the back of the cpu socket area, and the temps dropped dramatically on the mobo, but no change on the cores.  For comparison, here are the readings after 5 mins idle.  Core temps drop super fast, but the mobo temps take a few mins to come down.

[W-L]

3 minutes ago, Gargone77 said:

I forgot to mention, the first time I noticed this, I took the back panel off, and noticed almost immediate drop in temps, then I gently blew some compressed air across the back of the cpu socket area, and the temps dropped dramatically on the mobo, but no change on the cores.  For comparison, here are the readings after 5 mins idle.  Core temps drop super fast, but the mobo temps take a few mins to come down.

That sounds about right as the socket area would hold the surrounding heat for longer and need time to dissipate since the core is directly at the source it would be more immediate. 

[Gargone77]

thanks so much for your input!

[Krillingt75961]

Might want to get another case fan to blow across the board to help cool it off if it is having issues with cooling because of the case.

[Gargone77]

I have 5 120mm fans in here, all PWM.  2 intake in front, 2 exhaust at top rear, and 1 rear upper.  The CPU and GPU coolers are both 120mm as well.  There is a LOT of air moving inside the case, and across the top of the mobo.  Sadly, there's not much room on the back side for air to move, then add in all of the cables...  Since the design of this case seems to be set for negative bias, I've considered drilling a vent in the side panel behind the CPU socket, add a dust filter, and let air get drawn in across that area.  Any thoughts on that?

[Gargone77]

so, a bit of an update.  I was cleaning inside my case today and noticed for the first time, not much air coming in through the front fans.  When I had installed them, they flowed great...but I checked that flow with the front cover off.  The crappy foam dust filter in the front cover has been severely limiting air flow through the fans.  I pulled that foam out, and put the front back on, my board reading doesn't go over 60-61 under intense load now, and the fans are quieter, since they're not fighting to breath.  I'll go ahead and say problem solved for now.

 

However, I would like to have dust filters on the two front 120mm fans.  Anyone have any recommendations for dust filters with minimal restriction?

[airdeano]

a simple mesh filter is less restrictive than a foam filter. granted the mesh will still allow dust in, but it won't burn up inside.

[Guest]

On 28/02/2017 at 5:19 AM, W-L said:

For the old AMD CPU's they shouldn't really exceed 80C and will start throttling just before that, as for different temp readings that not uncommon especially if they are taking it from the Core vs package or board itself. 

Also I think AMD use shite thermal sensors unless I've read wrong.