GA-78LMT-USB3 Rev 5.0 (EasyTune 6 & CPUID HWMonitor) Interpreting Temp Readings

[mc88dx]

Hello,

I have a GA-78LMT-USB3 Rev 5.0 motherboard along with a AMD fx-6300 cpu.  

When I first built my computer I used EasyTune 6 to see my temperatures.  While testing I would open up Battlefield 3 to the same chapter in a campaign mission and just let my player stand around.  My CPU temp according to EasyTune 6 always stayed at 65C.

Then I changed the stock CPU cooler and opened up the game to the same scenario.  The CPU temp on EasyTune 6 dropped to about 55C.  I assumed this was Socket Temp for the longest time.

Then I installed CPUID HWMonitor and got these readings with BF3 running:
TMPIN0=39C
TMPIN1=44C
TMPIN2=55C
Package=39C

In Easytune 6 I get these two readings:
System=39C
CPU=55C

(see pic below for details)

So seeing that TMPIN2 on HWMonitor and CPU on ET6 were always the same I thought TMPIN2 was always socket temp.

Then I read some other forums about how to interpret CPUID HWMonitor readings for Gigabyte boards.

http://www.se7ensins.com/forums/threads/cpuid-hardware-monitor-question.922872/
TMPIN0 = System Temperature ---- This is your PCB or Motherboard sensor temperature
TIMPIN1 = CPU Socket Temperature ---- Temperature sensor that is placed between the socket and the PCB
TIMPIN2 = Motherboard Chipset Temperature ---- This is your Northbridge (Not CPU-NB don't get these confused) temperature

http://forums.tweaktown.com/gigabyte/41451-bios-temps-vs-coretemp-hwmonitor-readings.html
TMPIN0 should be system (southbridge)
TMPIN1 should be CPU
TMPIN2 should be Northbridge.


According to this TMPIN2 is not even on the CPU at all it's underneath a heatsink with the GIGABYTE logo.  Also the actual socket temp is TMPIN1 on HWMonitor.

So it doesn't make sense to me that ET6 would use the Northbridge temp nor that the Northbridge temp would decrease when I changed the CPU cooler.  Though the stock AMD cooler blew air down towards the motherboard and the new cooler blows air towards the rear fan.  Would the hot air from the stock cooler really raise the NB temp 10C?  Doesn't seem that likely to me.  But I don't know.

So I would like to know these things. What sensor is ET6 using for the CPU temperature? Also what temps is HWMonitor really showing me? The system temperature on ET6 and HWMonitor line up with what people are saying at least.

Thanks in advance.

[autotech]

Yes that is possible that a decent cpu cooler blowing out the back would lower NB temp. Before your stock cooler was just blowing the hot air inside of case which raises temps.

Fought that same battle on a dfi motherboard I owned.

[AgentFXA]

That's why I only use cases which have a big side/door fan - it helps heaps to keep temps low (CPU/GPU/NB) especially in Australia

Find out CPU sensor? - get IntelBurn and run it 1 minute .. it will show you which temp is CPU ( it will run fine on AMD)

[mc88dx]

Thanks for the help guys.  That all makes sense.