i7 4790K temperatures

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Kishore Kamal

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I have just purchased i7 4790K and Asus z97 sabertooth mark 2. At ambient temp (31 C), In idle CPU reads 41C and at 100% load it is 84 C. Is this temps OK? I am using CM Hyper TX 3 cooler. Is this OK. In next summer I will buy Nactua D15 or NZXT liquid cooler.
 
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Hello man

Hello man

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That is a pretty high temp, considering the threshold for Intel CPUs is about 90-95C. But, I can explain the problem. The cooler you are using is 100% inadequate. I would recommend a cooler with at least one 120MM fan. A 240MM water cooler would probably be the best.
 
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Darkbreeze

Darkbreeze

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That cooler is probably better than the stock cooler, but not by a lot. Are you gaming or overclocking or doing anything that is likely to be stressing your cpu at a level anywhere near 100%. If so, I'd really recommend at LEAST getting a 212 EVO. Of course, I have no idea if you applied the thermal paste correctly or if the heatsink is completely seated on the cpu lid.

And is that CPU temp the socket temp or the core temp. What are you using to monitor the temps? If you're not already using HWinfo you should download it and run sensors. Let us know what your CPU and CPU core temps are then. It could even be an incorrect temp reading but 84 is probably too high. I realize it won't always be running at that load but I'd be at least a little bit worried at that temp.
 
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Kishore Kamal

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I have used HWinfo HW Monitor, MSI Intel extereme utility. I have seen others temperatures range, their ambient temps are about 25C. here in india now room temp is high 31C. I think 10C rise over room temp is OK? In winters room temp goes to 20 C or less.
During Sniper Elite 3 at ultra setting with MSI 280 OC 3 Gb, cpu temp does not cross 53C, and gpu at max 74C
 
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Kishore Kamal

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CompuTronix

CompuTronix

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Guys,

Let's not jump to conclusions. Intel tests processors in their labs at 22C, which is "Standard Ambient". The OP's ambient is 31C, which is 9C above Standard. All processor temperatures are based on standards and specification.

You might want to give this a read: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1808604/intel-temperature-guide.html

Kishore Kamal,

Corrected to 22C Standard Ambient, your idle temperature would be 32C and your load temperature would be 75C, both of which are fine, whether overclocked or not.

However, I need to know how you define 100% load. Which software utility are you using? I need more information.

Thanks,

CT :sol:
 
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Darkbreeze

Darkbreeze

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Your ambient and over ambient at idle temps are not the issue, so let's forget about those. It goes without saying that you're not going to have a 20c temp when the temp in the room is 30c. But regardless if the temp in your room was 50c, you would still only have a specific maximum threshold, regardless of minimums and averages. Intel states 72.72 is the max recommended temperature for the cpu. Period. Can you go past and even run at temps past that. Sure. Is it recommended. Anybody who says it's recommended to run at temps higher than 72c is just plain foolish. So if it's generally hotter than hell where you are and the ambient temps are very high, that's all the more reason to seriously consider a more appropriate cooler setup. I don't think you need to go to extremes and spend 100.00 on a liquid cooler but you definitely ought to think about getting something with a decent sized heatsink and at least one if not two 120mm fans.
 
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CompuTronix

CompuTronix

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darkbreeze,

That's not the whole story. There's a little more to Intel's Tcase specification. I've only ever found this information in two Intel engineering documents, so it's not exactly well known. You're not the first person to be unaware.

" ... Since the CPU sensor is located under the Cores, and not near the hot spots, there's a 5C thermal gradient or "offset" between Core temperature and CPU temperature. ... Core temperature is 5C higher than the Tcase specification. This means that whatever the Tcase specification - http://ark.intel.com/ - is for your processor, just add 5C to get the corresponding value for Core temperature. ... "

You might want to click on the link in my previous post to the temp guide and give it thorough read before you reply. Pay particular attention to Section 5 - Core Temperature

CT :sol:
 
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Darkbreeze

Darkbreeze

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I read part of it, I am going to read the rest. Just for my information though, I don't think I'm completely understanding something in your previous post. Obviously I'm not an engineer, I'm still just learning a LOT of aspects of computer hardware, software and application despite having been one of the few people who actually understood how to use the first Apple II GS our school received back in the 80's and running with it ever since.

What I don't think I'm grasping, or perhaps misunderstanding, is that it seems like you're saying that the lab temp they set at 22c and then all upwards readings are indicated from there. So if the sensors are assuming a 22c ambient but there is actually a 32c ambient, all reported sensor readings are going to be skewed by 10c?

That's doesn't seem practical. I've always been led to believe sensor readings are actual, or at least relatively actual depending on reliability of aforementioned sensors and the interpretation by software, with the temp reading in BIOS always being the most accurate but hard to go by due to the cpu state while the firmware is loaded. (In other words there's really no idle while in bios.) Anyhow, not trying to hijack this thread but I don't want to be giving anybody bad information either.
 
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CompuTronix

CompuTronix

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Correct. " ... We all remember science class where one of the basic principals for conducting any scientifically controlled experiment, is that it's critical to follow the same procedure every time. This eliminated variables so results will be consistent and repeatable. If everyone is testing their rigs with X stress software at Y Ambient temperature with Z measuring software, then it's impossible to compare apples to apples.

This is why processor temperatures continue to be a major source of confusion and debate. ... "



Correct.



Incorrect. " ... "CPU" temperature ... is the overall temperature of the processor. ... is calibrated to look-up tables coded into BIOS for each socket-compatible processor.

CPU temperature in BIOS is higher than in Windows at Idle, because BIOS starts the processor at boot voltage to ensure that it can initialize under any conditions. The monitoring utilities provided by motherboard manufacturers on your Driver DVD reads CPU temperature. Thermal code can vary greatly between BIOS suppliers and version updates, and can be wrong by up to 30C. Don't expect BIOS or CPU temperature to be accurate.



Correct.
 
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Darkbreeze

Darkbreeze

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"if measured Ambient is 25C, and reported Core temperature is 80C,
then at standard Ambient 22C, corrected Core temperature would be 77C."

So according to this, unless it's ALWAYS 22c in the room your computer is in, your reported temperatures are always going to be WRONG by an amount that equals the difference between 22c and whatever the ambient temperature actually is in your operating environment? If that's the case, why even bother with sensors and monitoring software. I can't think of one single person, well maybe one, who has ever posted anything to this effect on this or any other forum. I hope I got this wrong or there are a whole lot of people including myself and most the overclockers who post regularly around the forums who are seriously misinformed or just plain clueless of this fact.
 
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CompuTronix

CompuTronix

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You're just looking a little beyond the point. Folks post all sorts of temperatures while many times failing to mention ambient temperature, or take into account that ambient affects all computer temperatures.

The readings from the Digital Thermal Sensors within each core are giving you actual core temperatures. Whether at idle or a given load, if ambient goes up, your core temperatures go up with it.

If someone says his idle or load temperature is X, it's meaningless without knowing ambient. We have to know ambient so we have a way to compare temperatures against known and established standards and specifications.
 
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Darkbreeze

Darkbreeze

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Ah, but it doesn't actually change the true physical temperature that's being reported on the high end? If it says it's 80c, it's 80c. Within a reasonable tolerance for error anyhow. Is that right?

So when is it too hot then? Intel's document says consistent temp in mid 80's is too hot. Which would mean that the answer to the OP's question about his temps IS that it's running too hot. At least at 100% load. Correct?
 
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CompuTronix

CompuTronix

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Yes, of course, that's correct. If it's hot, it's hot. I can't debate that, however, I can quickly see that IF the ambient was 22C where Intel tests these processors, then the OP's temperatures would be normal. So I immediately know that there's really not a problem with his rig as it's configured with the information given.

Regardless, I still don't know what he's using for a load test, so that remains an unknown variable. If he's not using the proper test method, then his temperatures could still be too high.
 
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Kishore Kamal

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Kishore Kamal

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I have applied silver arctic 5 now, in the same way as i did for default thermal paste with hyper tx 3 cooler. Now my idle temp is 35C and at full load with Prime 95 small FFT 79C, and with MSI Intel extreme utility at 100% load it is 77C............................I am happy.
 
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