CPU running at 9* degrees?

[aidenrelkoff]

So of course this is wrong, it cant possibly be running at 9 degrees, but why is it saying it is? i checked a few programs and they all say the same. Any reason for this? I do know my cpu cant possibly run more then about 50* because immediately after tuning my pc off i can touch the copper heat pipes on my heat sink and there like 30-40* or so, and over all my system is quite cold, running games at max my GPU is only 54-60*. Anyways help is appreciated!

 

My Cpu is a FX-4130 OC'ed to 4.3 GHz (dont know way it says 4.7 GHz in pic) My system is below

 

[airdeano]

So of course this is wrong, it cant possibly be running at 9 degrees, but why is it saying it is? i checked a few programs and they all say the same. Any reason for this? I do know my cpu cant possibly run more then about 50* because immediately after tuning my pc off i can touch the copper heat pipes on my heat sink and there like 30-40* or so, and over all my system is quite cold, running games at max my GPU is only 54-60*. Anyways help is appreciated!

 

congratulations!

 

ummm, i hadn't found any temp app to function 100% with the AMD socket hardware.

i had to use the ROG connect to monitor my temps via the BIOS (UEFI) and that was

sketchy at times.

[needmorewood]

congratulations!

 

ummm, i hadn't found any temp app to function 100% with the AMD socket hardware.

i had to use the ROG connect to monitor my temps via the BIOS (UEFI) and that was

sketchy at times.

HW monitor from the guys who made CPU-Z works for me

[aidenrelkoff]

congratulations!

ummm, i hadn't found any temp app to function 100% with the AMD socket hardware.

i had to use the ROG connect to monitor my temps via the BIOS (UEFI) and that was

sketchy at times.

So what your saying is that the physical core is 9* but like the heat spreader on the cpu would be like 40* right?

HW monitor from the guys who made CPU-Z works for me

D.L. link?

[needmorewood]

D.L. link?

http://www.cpuid.com/softwares/hwmonitor.html

[aidenrelkoff]

http://www.cpuid.com/softwares/hwmonitor.html

thank a bunch!

[aidenrelkoff]

HW monitor from the guys who made CPU-Z works for me

 

 

congratulations!

 

ummm, i hadn't found any temp app to function 100% with the AMD socket hardware.

i had to use the ROG connect to monitor my temps via the BIOS (UEFI) and that was

sketchy at times.

well, it is legitimately running at 9 degrees Celsius... holy crap... wow

[airdeano]

well, it is legitimately running at 9 degrees Celsius... holy crap... wow

 

not unless your ambient is 0°-2° it isn't.

what is your room temperature the PC is located?

[Kamina]

My FX 8350 @ 4Ghz stock speed with power saving features disabled in BIOS. Idled of course.

It gets noticeably hotter at 40c if put the lowest setting on my fan controller for my chassis. Maybe you have a very well ventilated tower or maybe you won the silicon lottery.

[aidenrelkoff]

My FX 8350 @ 4Ghz stock speed with power saving features disabled in BIOS. Idled of course.

It gets noticeably hotter at 40c if put the lowest setting on my fan controller for my chassis. Maybe you have a very well ventilated tower or maybe you won the silicon lottery.

 

My case is a crappy "no name" brand that only has 1 exhaust fan and no intake fan. Running minecraft max settings (one of the most CPU intensive games) i get 80-120 fps and my cpu says its 32*. Also my exhaust fan is only a 3 pin so it runs at 100% all the time, that might have a effect too.

 

not unless your ambient is 0°-2° it isn't.

what is your room temperature the PC is located?

 

Its ~23*

[Priller]

AMD has an odd issue with reporting very low temps at idle or under light load. 

 

Most if not all temp reporting software will be wrong. Core temp, OCCT, and my motherboard all give me different temps. 

 

Focus on the temps under load after a period of running and try to set a fan to kick on at a specific temp and that can help you determine which is closer to being true. None will be exact.

[Grave]

Look into reading overclock.net posts about OCing your specific processor. You can find out more accurate ways to measure temperature, attainable speeds and max frequencies as well as methods to keep your system cool when mass overclocking. Lots of people take pride in overclocking older processors, intel or amd, and even AMD APUs. Hell, the most uncommon processor there is the FX-9000's.

Even if you're not aiming for tippy-top OC, that forum has been a godsend for me. So much to read and very informative.

[Sandzsteedt]

There is tons of discussion around the internets about this specific issue with all new AMD processors or APU's reporting temperatures that seem very low.

 

The first factor is that the temperature reported is the average for all cores. I think the term is CPU package or something, but unlike Intel it is indeed the average for the whole CPU.

Secondly the temperature reported is low because it has to do with the fan curves for the AMD coolers. I have read from a few places that the low reported temps are a way for the CPU coolers to be run more silent because the fan will spin down earlier due to the fact that temperature it is reading is low. This is of course true because most fan curves are temperature based.

 

There is however laws of physics you can't ignore and especially in the realm of thermodynamics. Read up on those if you are more interested in them.

 

The CPU package temperature can't be lower than the ambient temperature if you are cooling it with the ambient air. Because if it was colder than ambient temperature, the ambient air would actually be heating it up instead of cooling it.

 

There is lots of speculation about what the actual reading is that the AMD CPU/APU is reporting. Some have concluded that it could be the temperature above ambient. So if you have a room at 25C and your CPU reports 9C then the real CPU temp would be 34C.

That theory works in some situations but is not so valid in others.

 

Here are two real world examples of systems that I run right now:

My AMD A8 3870 APU is running in a file storage rig and is cooled by an older Noctua heatsink NH-U12P with one 120mm Noctua fan. Ambient temps are around 25-27C for that machine. It reports APU temps around 5-15C at idle and 17-25C at light load. It's a file storage/movie rig so light load usage mainly.

So in this case the theory of CPU temp + ambient = real world temp is quite accurate.

 

My water cooled gaming rig is running FX 8350 processor with Tri-Fire 7970's OC'ed in the same loop. GPU's report highest temps at 51C and my two water temp meters are reporting around 34-36,5C water temperatures during heavy gaming load of several hours non stop. I have way overkill radiator capacity and I have verified the water temps with a IR heatgun and also by feeling the tubes by hand.

However the CPU is reporting load temps around 32-36C while under the same water loop. I have checked CPU block temperature and motherboard temperature behind the CPU with IR heat gun and they are very consistent with the water temps. So the fully metallic block is usually 33-36C and behind the motherboard I am getting 32-35C.

 

If we use the same formula of CPU temp + ambient temp (in this case the ambient is the water temp) the real world CPU package temp would be 36+34= 70C. 70C with a crazy overkill water loop AND while the CPU is running stock clocks and stock volts sounds quite crazy and I have my doubts about that theory being correct. Also since the temps behind the motherboard and the CPU block are so low that I don't burn my hand at all and IR gun backs this up, it seems to me that the CPU temp + ambient temp theory is not valid either. I doubt the motherboard and CPU PCB would be able to reduce temps so much that 70C core temps would drop all the way down to 32C when measured at the back of the motherboard PCB and right behind the CPU socket.

 

 

So treat this post as a real world report on the AMD CPU temps but not as an answer as to why you are seeing the temps you are seeing.

All I can say is that the mystery still lives on. I have read many posts and articles around the internet and I haven't seen a very believable explanation as to what the actual temperature is that the CPU package is reporting or the formula behind the temperature to calculate it.

 

Edit to some numbers I double checked. Only made a difference of 6C, so not much.