i5 7600K OC temps

sdspiros

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Feb 27, 2017
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System:
- AsRock Z270M Extreme4
- Intel i5 7600K
- G.Skill TridentZ 16GB (2 x 8GB) DDR4 3000
- Zotac GeForce GTX 1060 Mini 6GB GDDR5
- 240GB PNY SSD
- 4TB WD Blue 5400RPM

Bios modifications:
Flashed to use version 1.4
Selected the XMP profile to get the DDR4s working at 3000
Selected the 4.6 OC profile provide by the AsRock Bios

Temperatures at Idle are ~25-30c
Temperatures using Cinebench R15 CPU test max out at 65c (3 of 4 cores didn't hit 60c, CPU score was 750cb)
Temperatures using Prime95 v26.6 for ~15 minutes went up to 80c

Anything to be concerned about? Do I need to stress test the machine more thoroughly? I've read that manually setting the OC profile could be more effective, but this is my first overclock and I couldn't get anything >4.4 to run stable without using the AsRock profiles. Thoughts?
 
Solution
Although i have not seen 80c on my 7600k , i have seen it hit 68c. I am clocking mine stable at 4.8ghz at a voltage of 1.33 ..
According to Intel, they are telling folks not to clock these 7th gen a lot. Many temp spikes are being reported.
Its just my opinion and you know how those go. I dont use XMP mode. Ram is more of an amount needed over speed. So 2933 is fine with me.
Try using a profile similar to that with your multi at 45 or 48 x100. You will see a average temp around 45c to 50c and a clock of 4.5 - 4.8..
Really not sure if this will help you, just thought i would share a way someone is tunning their 7600k
Your CPU can go up to 80 C max load. Your temps are good.

Remember max load should mean after a little while (half hour) should show how high temperatures will go. I at least find on my AIO cooler that temps are amazing at first but creep up, nothing bad here tho.

On air they usually spike right up anyway.
 

sdspiros

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Feb 27, 2017
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Thanks for the response. I should have mentioned, this is in a Silverstone HTPC box air cooled with a low profile Big Shuriken HS and a Noctua 120mm. Would stress testing for a longer period provide any benefit? I highly doubt I will tax the CPU that much during normal operation, but I want to ensure stability on this new build before I do much more with it. Thanks again.
 

sdspiros

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Feb 27, 2017
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Thanks. Thoughts on modifying the vcore settings. the AsRock profile for 4.6 set voltage at 1.3. Should I knock that down to 1.2 (or something else). Then check stability?
 


yes could slowly lower it to see

profiles usually use more voltage than required

 

sdspiros

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Feb 27, 2017
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What about Offset vs Fixed. I thought Offset was the way to go to only use higher voltage when necessary, but I couldn't make it work and the auto profile used fixed.

 
Prime95 / Synthetic Stress testing programs shuda gone out the Windows w/ Haswell. You have two choices:

a) Run the older version w/o AVX and other modern instruction sets which proves that your OC is stable ... but not when AVX is present.
b) Use the new one where the AVX voltage bump is capable of permanently damaging your CPU.

The other things worth noting are:

a) you can be 24 hour prim 95 / AIDA 64 stable and fail under application based multi-tasking benchmarks.
b) did you build the PC to run applications and games or get ya name posted on competitive overclocking web sites ?

I now save a lot of OC testing time simply by using RoG Real Bench which uses AVX but in a manner whereby it's used just like "in real life" using reall applications and not in a manner that presents a danger to the CPU or which artificially limits your OC.

The profiles basically pre-selected data that works on 99% of CPUs. Therefore you particular CPU has a 99% chance of being able to run higher and cooler.... more so if you do not artificially limit the OC by asking it to sustain synthetic loads which it will never see again.

Here's some data from overclock.net

Average OC 5.08
Median OC 5.10
Average Vcore 1.36
Median Vcore 1.38
 

sdspiros

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Feb 27, 2017
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I never even heard of competitive overclocking until I built this rig last week. Certainly not my goal. I picked up a 7600k and simply want to make sure I take advantage of the OC capabilities but am not looking to push the limits with anything. Reason for the build was to have something powerful enough to do video / raw photo editing and I'll probably do some game emulation as well.

As stated above, I have been using the old version of P95 (26.6) to do the stress testing. Based on other things I've read if I can get past the CPU Cinebench test and about 10 minutes of Prime95 then I should have a stable setup.

I think I found the settings I'm going to stick with for now. First I used the AsRock 4.6 profile which set the Vcore to 1.300 and gave me temps at load up to 81c when using Prime95. I just played with the Vcore setting and was able to go down to 1.220 and still pass the 10 minute mark on Prime95. This dropped my temps down to 72c at full load on Prime95.

I tried using the 4.8 OC profile but I couldn't get through the 10 minute mark using Prime95 without encountering the BSOD, and the temps maxed at 83c. Again, I don't think this extra boost will really give me much more from a usability standpoint so I don't think it's worth tinkering with any longer. Just thought this chip should be able to get there without that much power. Maybe not. Thoughts?
 


1. Many sites require x hours of P95 or other synthetic testing before you can validate your OC to be posted on their leader boards. But again, what is the point of proving that your OC is stable with a synthetic test program that you will never use again ? What happens when you try actual programs ? What happens when you multi-task several programs ? When building my current rig, I was P95 stable for 24 hours but when I tried to run and application like H.264, the system crashed. So of what value was that 24 hour test ?

2. Your P95 test proved that as long as you don't run any modern programs with AVX or any other modern instruction sets ... yeay ! But was the goal in building the PC to be able to run P95 ... or was it to run games and programs ? If it was the later, then why not use a stress test that combines several of the most demanding ***real applications*** ?

3. 10 minutes of P95 proves nothing. To be included on overclock.net's list of OC's ... you must fulfill one of the following requirements:

Synthetic tests
Prime v28.7 1 hour
OCCT 4.4.1 1 hour
Linpack from the Linpack Package download run at max settings (not recommended) 2 hours
Prime v27.9 3 hours
IBT 3 hours

Application based test
x264 16T 8 hours
Realbench 8 hours

As i said previously, I have seen OCs pass all of those criteria and then fail in the application based tests.

3. I think you should forget the "pre-sets" and move on to determine an OC for your particular CPU. One way to show how much unnecessary headroom you have in your OC is to lower the core voltage. After using a pre-set I am usually amazed at how much lower the CPU can run.

4. Also ... you should proceed sequentially with the following to determine limits:

a) Find maximum core multiplier leaving cache at default and RAM at default JEDEC setting
b) Find maximum core multiplier leaving cache at default and RAM at XMP setting
c) Find maximum cache multiplier at max core and RAM at default JEDEC setting
c) Find maximum cache multiplier at max core and RAM at XMP setting

5. Remember that your OC is limited by the quality of PSU to deliver clean, stable voltage as well as the MoBos ability to do the same.

6. I would suggest downloading RoG real bench and HWiNFO 64 to provide stress testing and monitoring. Check your rail voltages and see how much they vary from nominal during the tests (< 1% ideal)

7. For guidance on the process, you will find some good instructions here:

http://www.overclock.net/t/1621347/kaby-lake-overclocking-guide-with-statistics
 

sdspiros

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Feb 27, 2017
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Thanks again for the feedback. Tinkering with the settings a bit more I seem to be stable at 4.6 with voltage offset set to 30mV (.03v). Cinebench CPU test ran successfully and I ran P95 for 15 minutes with the temps maxing at a frosty 66c. I'm much happier with this vs the 82c that I started with (@ 1.3v fixed).

I'm done using Prime95, Cinebench or any other stress testing tools for now. I'll be doing some "real world" application testing now (video encoding, raw photo editing, gaming, etc) to determine stability. I'm using HWinfo64 to display all my stats on my desktop (via Rainmeter dashboard) so I'll be closely monitoring until I'm satisfied.
 

jackandbudlight

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Mar 22, 2012
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Although i have not seen 80c on my 7600k , i have seen it hit 68c. I am clocking mine stable at 4.8ghz at a voltage of 1.33 ..
According to Intel, they are telling folks not to clock these 7th gen a lot. Many temp spikes are being reported.
Its just my opinion and you know how those go. I dont use XMP mode. Ram is more of an amount needed over speed. So 2933 is fine with me.
Try using a profile similar to that with your multi at 45 or 48 x100. You will see a average temp around 45c to 50c and a clock of 4.5 - 4.8..
Really not sure if this will help you, just thought i would share a way someone is tunning their 7600k
 
Solution

sdspiros

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Feb 27, 2017
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Thanks for the feedback. I've been holding steady with my configuration at 4.6 at 1.3v. Idle I'm in the low 30s and it has max'd out at 68, but it rarely gets to this point. More importantly, it has handled everything I've given it for the past 3 months without a single crash (mostly game emulation and video encoding). Next time I feel like tinkering I may try your suggestion. Thanks again for the info. Good to know Intel's take on overclocking, especially if it is based on feedback they have been receiving.