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What is my CPU temperature?

R

Roman5

Weaksauce
Joined
Sep 3, 2009
Messages
73
I'm confused on various readings. Bios tells me my cpu temp is 46C and it fluctuates between 45 and 48 normally. Easytune 6 tells me the same so I guess it's reading the bios. Right now, easytune says CPU: 48C, system 34C. Coretemp tells me CPU#0 32C. So what do I assume my idle cpu temp is, 32 or 48? These numbers are pretty consistent every day, just a bit of fluctuation.

Also, there's this figure of 79C all over my temperature programs which has been there for days as well, always 79C.

Everest says 79C for CPU but reports the cpu cores as 32C.

Sisoft sandra reports 79C as auxiliary temp whatever auxiliary is, (yet everest says aux is 35C).

HWMonitor reports 79C as TMPIN2 (and TMPIN1 as 46C and TMPIN 0 as 34C)

Speedfan reports 79C with a little hot flame icon next to it as temp 3.

I read that this 79C or TMPIN2 could be to do with a dead sensor or unconnected sensor. And this 79C never ever changes. Except when I booted from cold one morning and it started at 77C and went up to 79C within a minute or so, so I've no idea why it even moved 2 degrees. Can anyone make head or tail of all these different numbers? Cos I sure can't, lol. I just want to know what my proper cpu temp is, motherboard temp and case temp.
 
Ok, I'm currently running prime95 for the first time for 30 minutes, on blend. My motherboard is definitely TMPIN 1, I know that now. After 20 minutes of prime 95, my cpu CORE temps have gone up to 43C and staying at that. Motherboard gone up to 57C and staying at that. Is that good so far? The 79C doesn't move at all so it must be a reduntant number. Easytune 6 hasn't changed since starting prime95, it's reporting 35 system and 46 CPU for some reason, no idea why.
 
That 79°C is most likely an unconnected sensor. It could also be a sensor that reports wrongly due to a BIOS bug so I would look up your motherboard information and contact that manufacturer if it bothers you. When you are looking for your CPU temps take a note of what the ACPI temperature is in HWMonitor. This is the reading for the CPU socket, not the chip itself. You can then compare it to other programs so you know which are reporting this temperature instead of the actual core readings. Either the TMPIN 0 or TMPIN 1 reading in HWMonitor will likely be your chipset (not the same as the NB) temperature. This value should increase during Prime95 or any other CPU intensive usage. Do us a favor and make yourself a signature so people know what motherboard and CPU you are talking about. It makes answering these questions a lot easier.

58°C is higher than your chipset should be. Touch the heatsink and see how hot that is. Try blowing a spare (80mm+) fan across it and see if the temperature drops. You may need to remove it and scrape off then replace the stock TIM if it came with a bad mounting.
 
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Ok, my motherboard is gigabyte GA MA770 UD3 rev 2.0, and my bios is FB. Processor is phenom 550 BE at stock 3.1GHz and at 1.34v. I don't see anything that says ACPI in HWMonitor. I can tell you though that after 35 minutes of prime95, it says TMPIN0 34C, TMPIN1 57C, and TMPIN2 79C. And it says Core#0 and Core#1 both 42C right now.

Everest also reports Core#0 and Core#1 both 42C as well. And so does CoreTemp. Everest says motherboard is 57C, same as TMPIN1 in HWmonitor, so TMPIN 1 is definitely motherboard. So does motherboard temp mean the same as chipset and is the motherboard temp too high?

Now that prime95 is stopped, my motherboard temp is back to 47C. I read that's fairly normal, no? If my heatsink wasn't seated properly, and I can tell you that it's firmly in place from when I did it and it had pre applied thermal paste on the heatsink, they why would my core temps be so low?
 
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Somethings not right here. The TMPIN1 and Everest motherboard temp of 57C must surely be my cpu temp, that sounds about right for a stock cooler under something like prime95 doesn't it? And perhaps TMPIN0 of 34C is the motherboard temp. I've read on some other forums where they say TMPIN1 is CPU. So why on earth is everest telling me that 57C is motherboard, and why is everest reading 79C for CPU temp. Mysteries!
 
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wow those temp sensors are all screwed..

no the 57C is your cpu socket temp.. the 43C is your core temp.. and what is the third temp showing? that ones most likely your chipset..

when you put the processor under load the chipset temp should not change at all.. maybe 1-2C at the absolute most due to the heat increase in the case..

your core temps are absolutely fine.. its a dual core processor at an 80w TDP.. its not going to throw off that much heat.. even my brisbane x2 be-2350 processor at 3ghz 95w TDP only hit 50C max with an aluminum block stock heatsink.. and thats a 65nm processor as well.. so your temps are normal..
 
Thanks for the info sirmonkey1985, appreciated. The chipset temp, is that the 79C you're referring to? That doesn't move at all. The only time I ever saw any movement was when I shutdown the pc overnight and booted up completely cold next morning. I immediately saw 77C and then 79C within a minute or so. Other than that, it doesn't move. So is 79C ok for chipset or are you referring to the 35C temp?

So, is core temp ( 32C, and 43C under prime95) what should be regarded as my true cpu temp? I presume that means the actual heat of the chip, and the socket temp of 46/57C is just the heat of the socket the chip sits in, right?
 
Hey guys, I've almost put this to rest thank goodness, slowly unravelling the mystery.

Gigabyte forum has confirmed to me that the 79C is in fact a bug to do with 3rd party monitoring software and it's a known issue. This screenshot shows someone else who had it.
So it lays that to rest now and I'm relieved.
http://forum.giga-byte.co.uk/index.php/topic,406.msg1846.html#msg1846

What is also interesting is that his TMPIN0 and TMPIN1 temps are HIGHER than his core temps, and my TMPIN0 and TMPIN1 are also HIGHER than my core temps. But what I don't get is, SOCKET temp is MEANT to be LOWER than core temp. My TMPIN1 is 46C. It's the same as my bios cpu socket temp reading. So TMPIN1 is obviously cpu socket as sirmonkey1985 said.

How can both his and my socket temps be higher than our core temps?
 
because the socket temp is always higher then the core temp... its reading the temp of the cpu under the processor.. and they offset the temp by 10-15C depending on the manufacture of the motherboard.. the actual sensor has had no use since the old socket A days when there was no core sensors.. but its still there for the cpu protection part of the bios since the bios cant read the core sensors..

a good example is my m2n-sli deluxe board with my x2 6400+.. the cpu sensor on the motherboard shows it running at 63C but the actual core temps are 53/54C..

btw an easier way for us to help you figure out what the sensors are.. is to take a screenshot with speedfan, easytune6 and coretemp... that way we can tell you exactly what each temp is.. and i recommend never using easytune for temps because its usually wrong to begin with.. i recommend speedfan for hardware temps and coretemp for the cpu..
 
sirmonkey1985, thanks a lot for the explanation! That puts my mind to rest that core temp should read lower than socket. Here's some screenies from HWMonitor, Coretemp and speedfan. Also shows you idle and orthos load with HWMonitor. A chap who works for gigabyte told me that TMPIN0 is system temp and TMPIN1 is CPU. System temp is case temp or motherboard?

http://img246.imageshack.us/img246/5484/idlec.jpg
http://img169.imageshack.us/img169/9162/stresstest.jpg
http://img151.imageshack.us/img151/2663/screenshot529.jpg
http://img170.imageshack.us/img170/8215/screenshot531.jpg

I've recently flashed back to an earlier bios version showing lower temps than here. I've since seen that according to the gigabyte cpu compatibilty list for my motherboard, the x2 550 on this motherboard is meant to have the bios version I just got rid of. So my current temps may be inaccurate by 5 or 6C and I need to flash back. So this easytune screenshot was taken a few days ago before flashing back.The other above screenshots were taken last night before flashing to the earlier bios. Hope that all makes sense, lol.

http://img27.imageshack.us/img27/1151/screenshot495.jpg
 
seeing as how the TMPIN0 never changes.. id probably say that the guy from gigabyte is right.. though it makes absolutely no sense why the chipset sensor is broken.. gigabyte should be slapped for that.. this is the 3rd or 4th board ive seen them release with broken sensors in the last couple years..
 
Its an AMD thing.. they have always been offset by about 10C.. even my socket 754 system the socket temp is 10C higher then the core temp..
 
OK thanks. So this is specific to AMD chips, I understand now. So everyone who has an intel processor will always see core higher than cpu, and all or some people with certain AMD processors will see core lower than cpu, did I get that right?
 
Roman5 said:
OK thanks. So this is specific to AMD chips, I understand now. So everyone who has an intel processor will always see core higher than cpu, and all or some people with certain AMD processors will see core lower than cpu, did I get that right?
Click to expand...


usually yes.. in the end it really depends on the board manufacture when it comes to intel.. I'm not totally sure why AMD processors/motherboards have been this way.. but its never changed.. its also why we recommend everyone use coretemp to monitor cpu temps instead of relying on the garbage software that comes with the motherboards..
 
sirmonkey1985 said:
we recommend everyone use coretemp to monitor cpu temps instead of relying on the garbage software that comes with the motherboards..
Click to expand...

See now that this is where I'm getting conflicting opinions from people. Some say core temp is more important, some say overal cpu temp. For instance, the max operating of the 550 is 70C. This is what someone said to me:

"Your mixing the temps up, any official temp a maker states is the overall cpu temp, not core temps to watch, so as you said ur max safe limit is 70c, then using something like hwmonitor or the like and go by overall cpu temp and not core temps"

Now if I unlocked my cores, my ability to read core temps disappears as a side effect of unlocking. So, I would only be able to go with overall cpu temp.
 
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