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High temperatures? i5 3570k

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  • Intel i5
  • CPUs
  • temperatures
  • Processors
  • Intel
Last response: in CPUs
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September 6, 2014 2:33:48 PM

Hi guys, I have been seeing what I personally think are quite high temperatures for my i5 3570k. I get up to 40C idle, and if my CPU is running close to 100% it can reach like 80C-85C. Playing Diablo for a while it hits around 60C to 65C sometimes but it rarely gets used more than 60%. I recently installed the Hyper 212 evo and though I am able to get much better temps, they are still quite high. I did overclock the CPU to 4.3 GHz and the V is ~1.25.

SETUP

Mobo: ASUS Z77-a
CPU: i5 3570k
PSU: Corsair VS 450 (I think)
GPU: HD 7870 Powercolor Vortex II edition
RAM: 2x4GB Corsair Vengeance
Case: Coolermaster Elite 430

FANS: I use the fan that came with the case on the front, I also use 2 Corsair Air Series AF120, one on the side pushing air onto the GPU, and one exhaust out the back of the case. I also use the hyper 212 evo with the fan pushing air towards the exhaust fan at the back.

Lastly, I used the thermal compound which came with the Hyper 212 when I installed it.

Any help appreciated, thank you :~)

More about : high temperatures 3570k

a b à CPUs
September 6, 2014 2:39:10 PM

Installed correctly, applied thermal paste right? Plus, im assuming the boxed thermal paste is quite bad, may want to replace that.
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September 6, 2014 2:44:35 PM

LookItsRain said:
Installed correctly, applied thermal paste right? Plus, im assuming the boxed thermal paste is quite bad, may want to replace that.


I assume so. What thermal paste would you recommend? And also how would you say it should be applied?
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a b à CPUs
September 6, 2014 2:57:50 PM

The thermal paste that comes with cm coolers is actually quite good, on par with the likes of arctic silver 5, mx2 etc. so as long as it was applied correctly the paste is not the problem.
The problem I feel is in your OC. 1.25v is a tad high for 4.3GHz, that cpu is capable of stable voltages lower than that, somewhere around 1.15-1.216. Idle voltage should be around 0.925-0.965 and offset should be ' - ' not '+'. For 4.3 pretty much everything else should be on auto, maybe bump cpu current to 110%
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September 6, 2014 4:09:06 PM

Those temps look normal with 1.25v on a hyper 212. Im currently using 4.6ghz with 1.2v and temps when gaming are in the 60s and prime95 75c tops.
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September 6, 2014 4:24:09 PM

Karadjgne said:
The thermal paste that comes with cm coolers is actually quite good, on par with the likes of arctic silver 5, mx2 etc. so as long as it was applied correctly the paste is not the problem.
The problem I feel is in your OC. 1.25v is a tad high for 4.3GHz, that cpu is capable of stable voltages lower than that, somewhere around 1.15-1.216. Idle voltage should be around 0.925-0.965 and offset should be ' - ' not '+'. For 4.3 pretty much everything else should be on auto, maybe bump cpu current to 110%


I am pretty sure I can't take the voltage down though, as I remember I got a blue screen when I reduced it. Then again I am not very experienced with this so I might have tweaked the wrong thing. Any help with that would be greatly appreciated!

EDIT: ALSO what would you say is the best way to apply thermal paste? Thanks again :) 
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a b à CPUs
September 6, 2014 6:55:08 PM

There is, as far as I can determine, no 'best' way to apply thermal paste. A lot is determined by the cpu and cooler in question. I've read a few posts where it was mentioned that the hyper212 EVO because of its direct contact heatpipes is best served by pre-loading the cooler groves with paste, then scraping excess away with a credit card. To the cpu is a large grain of rice sized blob running vertically. The preloading will eliminate any possible airgaps making for better contact, thus lower temps. For AMD cpus a good sized pea blob is better, AMD dies are wider than Intel under the lid.
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September 10, 2014 4:40:29 PM

Karadjgne said:
There is, as far as I can determine, no 'best' way to apply thermal paste. A lot is determined by the cpu and cooler in question. I've read a few posts where it was mentioned that the hyper212 EVO because of its direct contact heatpipes is best served by pre-loading the cooler groves with paste, then scraping excess away with a credit card. To the cpu is a large grain of rice sized blob running vertically. The preloading will eliminate any possible airgaps making for better contact, thus lower temps. For AMD cpus a good sized pea blob is better, AMD dies are wider than Intel under the lid.


Ok so today I got my Arctic MX-4 and I applied rice sized blob in the middle, and though I am noticing much better temps, I have realied that my temperature readings are quite sporadic (and yes I am sure that I installed the heatsink correctly) I actually noticed this after changing motherboards a week ago. One of my cores will be like, 34C and will then jump to 41 for a second, then jump back down to 37. It seems really all over the place and thats what is confusing.

The 2 programs I use to check are speedfan and HWMoniter

Thanks for the help :) 

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a b à CPUs
September 10, 2014 4:52:13 PM

Minar said:
Karadjgne said:
There is, as far as I can determine, no 'best' way to apply thermal paste. A lot is determined by the cpu and cooler in question. I've read a few posts where it was mentioned that the hyper212 EVO because of its direct contact heatpipes is best served by pre-loading the cooler groves with paste, then scraping excess away with a credit card. To the cpu is a large grain of rice sized blob running vertically. The preloading will eliminate any possible airgaps making for better contact, thus lower temps. For AMD cpus a good sized pea blob is better, AMD dies are wider than Intel under the lid.


Ok so today I got my Arctic MX-4 and I applied rice sized blob in the middle, and though I am noticing much better temps, I have realied that my temperature readings are quite sporadic (and yes I am sure that I installed the heatsink correctly) I actually noticed this after changing motherboards a week ago. One of my cores will be like, 34C and will then jump to 41 for a second, then jump back down to 37. It seems really all over the place and thats what is confusing.

The 2 programs I use to check are speedfan and HWMoniter

Thanks for the help :) 



Speed fan is terrible, try coretemp.
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a b à CPUs
September 10, 2014 8:58:11 PM

For Intel, use realtemp, coretemp or speccy. HWMonitor is ancient. It was written years ago when boards were of a totally different design, they had Northbridge and Southbridge chipsets as well as other components, that are now controlled directly by the cpu. But the pathways are still used, just by totally different components, like usb hubs etc, so what HWMonitor is reading 1/2 the time is a false temp from a USB controller, totally useless. It was a fantastic piece of work in its day, but is in need of a serious overhaul to match up with current designs. Use something else.

You have 4 cores. They do not all read and react to the same things at the same time, if Windows says 'start this' it'll be a working thread on core 1, temps go up from idle, and if at almost the same time you move the mouse, Windows says 'react to that' so core2 picks that working thread, temps go up but not much. So all 4 cores work separately on different threads with different usage, so different temps. Also the cores are not 'stacked', they are quartered on the die, so cores 1,3 maybe closer to the start of the heatpipes, whereas 2,4 are closer to the end, so run a few degrees cooler or hotter depending on usage times
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