Hi!
I have a question about the temperatures that I'm getting for my 4790K processor. Like some other people I'm getting extremely hot temperatures when testing the processor at full load.
I am using a Gigabyte GA-Z97X-UD3H motherboard in combination with a Thermalright True Spirit 140 cooler in order to get lower temperatures than the stock Intel cooler.
The temperatures are measured with HWMonitor, RealTemp and the Gigabyte System Information Viewer app. The last one shows slightly lower temperatures then HWMonitor and RealTemp.
The room temperature is around 19°C.
Idle I'm getting temperatures between 20°C and 26°C (depending which core). The Gigabyte app shows even a temperature of 18°C. So far so good.
In what follows I'll continue with the Gigabyte app temperatures, as the graphs are made with the Gigabyte app. Remind however that HWMonitor and RealTemp are showing higher temperatures (around 6°C higher).
As soon as I use Prime95 with the small FFTs test (latest version) to put the cpu under load, the cpu temperature increases instantly to temperatures around 92°C (HWMonitor is even showing 100°C from time to time).
In the graph below you can notice 2 temperature peaks. The first one (lower one) is achieved by running the Prime95 Blend test (max temperature after 3 minutes around 57°C), the second one is achieved by running the Prime95 small FFTs test as described above, with temperatures above 90°C.
The test is done immediately after a cold boot.
The cpu-cooler is at startup running at 550rpm, during load it increases to 1250 rpm.
Another thing I've noticed is that the temperature increases instantly from 18°C to 90+°C, within 2 seconds. As soon as I stop the test the temperature decreases instantly as well: within 1 second the temperature is decreased till 30°C. Next it takes 2 minutes to further decrease to 19°C (idle). This behavior looks very strange to me.
What is going wrong? Why do I get such a high temperatures during load? 90+°C without overclocking is dangerously high. I don't dare to overclock with such a temperatures.
Many thanks for your help!
Edit:
I've done the test with the default BIOS (F4) and the newest BIOS (F7) from Gigabyte.
Edit 2:
In the meantime I was able to do a stress test with the Intel Processor Diagnostic Tool and the Intel Extreme Tuning Tool (10 minutes). Temperatures increased until 71°C, core voltage increased until 1,269V (measured with RealTemp and HWMonitor). These temperatures are better than with Prime95, but still very high.
Edit 3:
After running Intel Extreme Tuning Tool for 1 hour, the max temperature was 73°C. In average the temperature was below 70°C. The idle temperature is around 25°C regarding the Intel tool. Room temperature should be around 19°C.
Hi all,
Since yesterday I have a new CPU (RMA). I've done some (short) tests with Prime95 small FFT's and I can confirm that based on these tests, the max temperature seems to be 10°C - 15°C lower. Without any BIOS adjustments I'm getting temperatures beginning 80°C. I have to admit that besides the new CPU I'm also using other thermal paste (Arctic Silver 5), but this shouldn't change the temperatures a lot: maybe 1°C or 2°C.
Next I've applied the recommended Intel settings from Ken (Intel support), which can be found back in the topic mentioned before (/message/260210# 260210 https://communities.intel.com/message/260210# 260210). You can find a summary of the proposed settings in this official Intel document:
2 changes I've made on my Gigabyte UD3H mobo are:
- I've put the VCORE voltage on 'normal' instead of manually adjusting it (because otherwise the voltage remains all the time the same instead of dropping when idle). Instead I've used a negative offset of -0,060V. This seems to run stable, however I didn't do long duration tests yet. But I didn't have any system crashes during testing yesterday evening, nor in idle, nor in stress. It might be even possible to decrease the negative offset even further (-0,070V or maybe even -0,080V).
- I've activated the XMP1 profile of my RAM. This could increase the power usage a bit (and hence also the temperatures), but since I am using Crucial Ballistix DDR3L memory running @ 1,35V (even when activating the XMP1 profile!) I don't expect any (significant) negative effect.
After applying these changes I've notice that the CPU speed is limited to something between 4,10 and 4,20 Ghz instead of the default 4,4Ghz (with default BIOS settings). These new values are actually correct, as 4,4 Ghz should, regarding Intel specs, only be achieved when only 1 or 2 cores ares stressed, not when all 4 cores are stressed as with Prime95 Small FFT's. (I didn't do any single core stress test yet.)
The temperatures I'm getting with these settings are even better. After running Prime95 with small FFT's for a couple of minutes, I'm getting stable temperatures around 64°C!
Notice this is achieved with an aftermarket air cooler, not with the stock cooler. I am using a Thermalright True Spirit 140 BW cooler.
I will do some more testing and if everything seems to be stable, I'll forward my settings to Ken (Intel support) so they can add them to the official documentation mentioned here above. I'll also mark the link to this thread as 'correct answer', but keep in mind that it's a combination of a new CPU with this settings which solved my problems. Without the new CPU I would expect that the temperatures would be 10°C - 20°C higher.
連結已複製
I am not aware of a "4750k" processor, but if you mean 4790k, I think the 38C is your idle temperature. What you need to get is your load (or stress) temperature. Get a program that puts your CPU under 100% stress. See what your temperature is when you do that. If you are not sure what programs to use, search online for one of these:
1) Intel XTU (free)
2) OCCT (free)
3) Prime95 (free) - I would not use this one... But if the other ones give you OK temperatures, please run Prime95 also and see.
4) AIDA64 (free to try, $39.95 for full use)
There are many other programs out there. Let us know what you get with load temps.
Here's another sufferer. We can't all be wrong or stupid. New build Asus Z97-A, i7 Devils Armpit 4790K, no overclock, checked and re-set water cooler, gives CPU temperatures of 90C when rendering.
The Intel ETU benchmarking shows a max CPU temperature of 87C (Score 901 marks). Prime95 takes me to 100C and 47% CPU throttling. I believe we should expect the CPU to run WITH THE INTEL STANDARD COOLER any software we throw at it at standard 'rated' settings with temperatures within operating limits. My CPU is going back where it belongs. Do I have to buy the same again, or is there a good reliable alternative that does what it says on the box?
It looks like the only way this CPU will operate on demanding applications is if it is underclocked. Do Intel have no quality control, CPU testing, or are they all as bad as each other?
Sorry to hear that.
I would suggest the i5 4690K. It's basically the same processor as the i7 4790K except it does not have hyperthreading and doesn't have the overheating problems. So unless you absolutely have to have 8 cores, I would highly sugget the 4690K. I have it in a couple of machines at work and they are fantastic. They are overclocked on crappy aftermarket fan coolers (Silverstone NT01-Pro) and running stable at 4.6GHz. With stock cooler, I was able to run stable at 4.2GHz. Give that one a try. Hope that works out better for you!
Ah, good to know it's not just me. I'm also having this "problem". Prime95 resets my PC immediately every time I run it.
Initially IET stress test was going as high as 100C and throttling occasionally. Like others my initial thought was that I'd messed up the thermal paste. So I took the cooler off (Prolimatech Genesis), cleaned the surfaces with alcohol, re-pasted and re-seated the heat sink. The temperatures were more or less the same. Prime95 still reset the PC every time it ran and IET was still peaking at over 100C. Way too hot.
The next thing I did was reset my BIOS to defaults. But after doing this Windows wouldn't start (blue screened before log-in screen with message 0xC000000F). In the BIOS I noticed the voltage was kind-of low, so I increased it to just over 1.2. Windows was then OK and running IET peaked temperatures out at around 70C, which I'm fine with for a stress test. So in conclusion I think there's something wrong with the Z97 BIOS voltage settings/defaults and this processor, in the general case.
I'm not sure what the deal is with Prime95. I haven't run it since changing the voltage settings and don't intend to. From now on I'm going to calculate all of my primes with pen and paper.
Hello RobinsonJ, ,
Do you still need assistance with this issue? There are multiple community threads available on this website with possible solutions or recommendations to address this issue.
For instance:
- /docs/DOC-23517 Troubleshooting Intel® Core™ i7-4790K / i5-4690K overheating
- /message/245999# 245999 How best proceed with overheating i7-4790K?
Please check on those links, I would recommend that you post directly on any of those 2 threads.
Regards,
