Temperature

bulldog147 · 29 Jul 2009 at 00:22

It really annoying as all softwares temperature showing different. OCCT show 4 degrees lower than realtemp and the same as HWMonitor is 3 degrees lower than realtemp.

Which one is total genuine temperature ?

Why is core 0 on the left side always higher than the core 3 on the right end ?

95thrifles · 29 Jul 2009 at 00:26

different cores are slightly out temp wise as your chip and heat sink are not perfectly flat (see the section on lapping in the advanced OC guide sticky) therefore where there is good contact you have better cooling than where there is less good contact
lots of programs display slightly different temps, I tend to prefer coretemp myself (one you dint mention, lol) but as to which is accurate I dont think you can be 100%, Id use an average, though a few degrees here or there doesnt really matter

bulldog147 · 29 Jul 2009 at 00:28

Realtemp show as core 0 - 85C, core 1 - 83C, core 2 - 81C, core 3 - 80C while the OCCT show as core 0 - 81C, core 1 - 79C, core 2 - 77C, core 3 - 76C and the HWMonitor show as core 0 - 82C, core 1 - 80C, core 2 - 78C, core 3 - 77C.

These are 4.2GHz with standard 1.300vcore and 1.65dram setting after 40 minutes using OCCT Linpack.

95thrifles · 29 Jul 2009 at 00:31

Theyre high, I wouldnt be running my cpu that high personally, too near threshold
Whats your system spec?
Id check your HSF is attached properly, maybe reseat it, ensure you dont have too much TIM applied

bulldog147 · 29 Jul 2009 at 00:40

many peoples saying 85C is accepted for i7 4.2ghz

JonJ678 · 29 Jul 2009 at 00:48

None of this is accurate, they're all educated guesses. It's based on a signal from a diode only designed to shut the processor down if it gets far too hot, so it's hardly accurately calibrated. Second its based on the tjmax value, which as far as I can tell is a complete guess used to convert the reading from the diode to a measurement in centigrade.

I use cpuid hw monitor, but try not to lose sleep over the numbers

bulldog147 · 29 Jul 2009 at 04:40

it really annoying when it getting at 85C full load on linpack but 83C on prime95. But, when under load, playing microsoft flight simulator x - the temperature is around 74C. I had try everything - push pull fans, still same temperature, try 1600rpm fan - still same temperature, try to turn the cpu cooler to face the rear two fans but temperature is well too high, turn the cpu cooler round to face top case big fan but temperature not bad at 44C idle but still full load of 85C. I don't like the vcore at 1.300v because it make the temperature too high, the reason for this high temperature cos of Hyper-threading enabled but if using 4 cores, 4 threads, the temperature is lots better at 10C degrees lower at around 75C.

I had spend hours and hours re-apply thermal paste, getting frustrated not able to get below 40C idle on 1.300vcore. The Antec 1200 case was suppose to be a good airflow but I am now serious of buying different case with more powerful air flow (a very cold air flow)

Which case is the best chilling cold air flow ? so, 85C on 4.2GHz is not very good (signs !!!) as I do have corsair 750W power supply - does it affect overclocking ? I getting blue screen death if I turn the vcore down to 1.26v.

Blackhorse · 29 Jul 2009 at 05:12

The thing you need to ask youself is do you actualyl have a need to run at that speed? (ie video editing)
Or are you just playing about?
I could quite easilly push mine up to 4.2ghz with extra voltage but i find 4.0 is more than i need and i get max temps of 75.
I could probably drop this temps by reapplying the paste and reseating the fan, as reading the forums after what ive done (the job i did probably isnt very good!)

Darrensen · 29 Jul 2009 at 10:57

One thing that always sticks with me is.

The hotter you run electronics, the less it will last.

My i7 rule is to stay below 85c under load! Preferably around 80c.

dr4g0nf1y · 29 Jul 2009 at 11:09

The temperatures are estimates, but also think of it like a point on a compass. If you're 0.5 degrees it's not that much, but the further your distance the further out you'll be.

Because they are high temps for a cpu anyway they aren't going to be as accurate compared to not being OC'd.

The best way to look at it is an average.

You're core is about 83 degrees

PaulyD · 29 Jul 2009 at 11:33

bulldog147 said:
it really annoying when it getting at 85C full load on linpack but 83C on prime95. But, when under load, playing microsoft flight simulator x - the temperature is around 74C. I had try everything - push pull fans, still same temperature, try 1600rpm fan - still same temperature, try to turn the cpu cooler to face the rear two fans but temperature is well too high, turn the cpu cooler round to face top case big fan but temperature not bad at 44C idle but still full load of 85C. I don't like the vcore at 1.300v because it make the temperature too high, the reason for this high temperature cos of Hyper-threading enabled but if using 4 cores, 4 threads, the temperature is lots better at 10C degrees lower at around 75C.

I had spend hours and hours re-apply thermal paste, getting frustrated not able to get below 40C idle on 1.300vcore. The Antec 1200 case was suppose to be a good airflow but I am now serious of buying different case with more powerful air flow (a very cold air flow)

Which case is the best chilling cold air flow ? so, 85C on 4.2GHz is not very good (signs !!!) as I do have corsair 750W power supply - does it affect overclocking ? I getting blue screen death if I turn the vcore down to 1.26v.

Your pushing for 4.2ghz on an air cooler with a known toasty chip, will get to a point where you reach a limit..