Question first overclock to 5ghz. can you fail OCCT LINKPACK and still be " stable "occt

indianajune1

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Jul 31, 2018
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hey guys , i just did my first overclock following the steps on a der8auer video for my i7700k and asus apex ix motherboard (i also have a kraken x62 aio cooler ) so far it seems stable jumping between 4.7-5ghz ( more on the 4.7 side unless its stressed ) at normal idel temps and when i run OCCT a max of 67c in all cores exept the first that spiked to 81c. no errors after 15 mins same-ish with , firestrike extream, userbenchmark, intel diagnostic tool. gaming in rage 2 it seemse to stay closer to 4.7 with jumps to 5ghz like i said but stays a cool 65c. however if i run the OCCT linkpack test it almost instintanusly shoots up to 90c and the test stops itself. i havnt run prime 95 casue i hared its even more stressfull. is link pack just for extreame overclocing or whatever ??? Im tempeted to call this stable but im new and idk if there is an instance it will be under that kinda load and hit 90c and turn off or worst case fry out
 

zx128k

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https://forums.intel.com/s/question/0D70P0000068ZPZSA2/thermal-sensor-issue-i77700k?language=en_US#471425

Kaby LakeSSE FrequencyAVX2 FrequencyVcore% Capable
7600K4.80GHz4.60GHz1.400V100%
7600K4.90GHz4.70GHz1.412VTop 89%
7600K5.00GHz4.80GHz1.425VTop 74%
7600K5.10GHz4.90GHz1.437VTop 56%
7600K5.20GHz5.00GHz1.450VTop 30%
7600K5.30GHz5.10GHz1.450VTop 5%
7700K4.80GHz4.60GHz1.400V100%
7700K4.90GHz4.70GHz1.412VTop 96%
7700K5.00GHz4.80GHz1.425VTop 78%
7700K5.10GHz4.90GHz1.437VTop 36%
7700K5.20GHz5.00GHz1.450VTop 12%
7700K5.30GHz5.10GHz1.450VTop 1%

From what you have written, "if i run the OCCT linkpack test it almost instantaneously shoots up to 90c and the test stops itself. " You are not stable. How close to 100c do you get? Have you tried an avx offset?


Useful information.
View: https://imgur.com/a/Jgw5d

 
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Karadjgne

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Herald
Linpack is a benchmark and the most aggressive stress testing software available today. Best used to test stability of overclocked PCs. Linpack tends to crash unstable PCs in a shorter period of time compared to other stress testing applications.

This project was created because Prime95 is no longer effective for stress testing like it used to be. LinX, IntelBurnTest, OCCT use outdated Linpack binaries from 2012.
This is true. Prime95 used to be a standard for stress testing, back when cpus were 'simpler' and not nearly as powerful as they are today, so P95 has simply become 'less able' in that respect.

However, Prime95 small fft is still the best overall for temp testing, as it uses a clean 100% load using the same instruction sets that games use, unlike Aida 64 or IBT, or OCCT, which mix in sections of linpack so the cpu can bounce from @ 80% to 130% loads and not give an even standard.

That's different to a stress test. Linpack excells as a stress tester simply because it is so brutal, but temps have to be ignored because it's so brutal. It'll go well and above any gaming scenario or even heavy loading like compiling or rendering.

Asus Real Bench, OCCT, Aida 64 are also better at stress tests than Prime95, because they too 'bounce' and use a variety of stressors, in an attempt to trip up the pc if there's any instability.

So temps and stability are now 2 different things, you'll never run the cpu at the 130ish % that the stress tests run, you'll rarely run the cpu at the 100% temp loads Prime95 small fft runs, but between the 2 you'll be able to get a good balance of a stable OC that'll not overheat the pc with any game you play.

The only thing about Prime95 to watch for is AVX technologies. Games in general use very little to none AVX, no AVX2 that I'm aware of and absolutely no AVX-512, so for a good baseline, all 3 types should be disabled or you'll get a 'false' idea of what you can expect.
 
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indianajune1

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Jul 31, 2018
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https://forums.intel.com/s/question/0D70P0000068ZPZSA2/thermal-sensor-issue-i77700k?language=en_US#471425

Kaby LakeSSE FrequencyAVX2 FrequencyVcore% Capable
7600K4.80GHz4.60GHz1.400V100%
7600K4.90GHz4.70GHz1.412VTop 89%
7600K5.00GHz4.80GHz1.425VTop 74%
7600K5.10GHz4.90GHz1.437VTop 56%
7600K5.20GHz5.00GHz1.450VTop 30%
7600K5.30GHz5.10GHz1.450VTop 5%
7700K4.80GHz4.60GHz1.400V100%
7700K4.90GHz4.70GHz1.412VTop 96%
7700K5.00GHz4.80GHz1.425VTop 78%
7700K5.10GHz4.90GHz1.437VTop 36%
7700K5.20GHz5.00GHz1.450VTop 12%
7700K5.30GHz5.10GHz1.450VTop 1%

From what you have written, "if i run the OCCT linkpack test it almost instantaneously shoots up to 90c and the test stops itself. " You are not stable. How close to 100c do you get? Have you tried an avx offset?


Useful information.
View: https://imgur.com/a/Jgw5d

Well the default of the OCCT link pack turns itself off when it hits 90c. I’d be afraid to turn that off tbh so I’m not sure how close to 100c I get. By “ trying the avx offset “do you mean decrease it ? I have it set to 3. Tbh this is my first overclock and I’m really naïve So I just followed every step in this guide minus the ram and raid
View: https://youtu.be/wlR7CNuoOXk
 

indianajune1

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Jul 31, 2018
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This is true. Prime95 used to be a standard for stress testing, back when cpus were 'simpler' and not nearly as powerful as they are today, so P95 has simply become 'less able' in that respect.

However, Prime95 small fft is still the best overall for temp testing, as it uses a clean 100% load using the same instruction sets that games use, unlike Aida 64 or IBT, or OCCT, which mix in sections of linpack so the cpu can bounce from @ 80% to 130% loads and not give an even standard.

That's different to a stress test. Linpack excells as a stress tester simply because it is so brutal, but temps have to be ignored because it's so brutal. It'll go well and above any gaming scenario or even heavy loading like compiling or rendering.

Asus Real Bench, OCCT, Aida 64 are also better at stress tests than Prime95, because they too 'bounce' and use a variety of stressors, in an attempt to trip up the pc if there's any instability.

So temps and stability are now 2 different things, you'll never run the cpu at the 130ish % that the stress tests run, you'll rarely run the cpu at the 100% temp loads Prime95 small fft runs, but between the 2 you'll be able to get a good balance of a stable OC that'll not overheat the pc with any game you play.

The only thing about Prime95 to watch for is AVX technologies. Games in general use very little to none AVX, no AVX2 that I'm aware of and absolutely no AVX-512, so for a good baseline, all 3 types should be disabled or you'll get a 'false' idea of what you can expect.
Hey , thanks for the response. Yeah , that’s why I was thinking of just leaving it cause it doesn’t seem like anything I through at it will reproduce what the link pack test will do. Everything else including OCCT regular my max is 81c and that’s a spike. Like I just said to the other guy , i’d be lying If I said I really understood the avx offset. I just filled that video and put it to 3. Maybe I should Change it ?
 

zx128k

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Prime95 was causing Intel cpu's to overheat and Haswell CPU's were thought to degrade. That's the only reason some people stopped using it and kept to versions of prime 95 without avx. Also the avx version would cause Intel CPUs to overheat, so some people stopped using that version. Overheating is instability and a stable system should be able to run anything.

With Prime95 10 hours of 8k fft and 10 hours maximum fft. If there are no errors, reboots or temp problems. Then you are likely stable, you still have to test PCIe etc. You can pass prime95 and aida64 but crash in PC games still. With Intel cpu's like my old 4.5GHz 4930k (x79). vcore had to be increased with each new version. I would pass every other program but if I did not pass prime95, I would develop issues down the road. See video encoding.

Some Intel cpu's failed prime 95 at stock because of issues with some versions of prime95, https://www.overclockers.com/forums/showthread.php/776500-Need-Help-with-Prime95-Stability

Not using prime95 is linked to a statement by an engineer at ASUS. From wiki, "An engineer at ASUS advised in a 2012 article on overclocking an Intel X79 system, that it is important to choose testing software carefully in order to obtain useful results:
Unvalidated stress tests are not advised (such as Prime95 or LinX or other comparable applications). For high grade CPU/IMC and System Bus testing Aida64 is recommended along with general applications usage like PC Mark 7. Aida has an advantage as its stability test has been designed for the Sandy Bridge E architecture and test specific functions like AES, AVX and other instruction sets that prime and like synthetics do not touch. As such not only does it load the CPU 100% but will also test other parts of CPU not used under applications like Prime 95. Other applications to consider are SiSoft 2012 or Passmark BurnIn. Be advised validation has not been completed using Prime 95 version 26 and LinX (10.3.7.012) and OCCT 4.1.0 beta 1 but once we have internally tested to ensure at least limited support and operation."
Prime95 will cause a system stable in other stress tests to develop issues. Prime95 is also close to tests using HEVC but you get error detection with prime95. HEVC can be just as hot as prime95 small fft and uses AVX instructions. Aida64 would be fine but fail with prime95. Aida64 uses AVX instructions too but also aida64 has lower temps. If I could get away with just aida64 then I likely have a 4.5GHz all cores 3800x.

How you want to stress test is up to you but note, you should have no issues whatever program you run. This includes temperature issues.
 

Karadjgne

Titan
Herald
Intel knows how brutal AVX instruction usage can get on a cpu. As does pretty much every motherboard vendor. So in newer bios versions they've included an AVX offset. What that does is lower your clicks by the set amount, to compensate for the excessive power usage and resultant heat output. With your offset at 3, it'll lower clocks 300MHz and any relevant voltages every time the cpu uses AVX. Some ppl use that, some p find it interferes with the stability of their OC and disable it, just dealing with the temporary temp rises, because there is so little usage.

My only real advise is to go through your bios and learn what the settings are for, what they do, what they mean, learn about OC, read posts on what you don't understand etc.
 
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indianajune1

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for shits and giggles I restored stock speeds and ran OCCT LINKPACK test on stock and I got a max temp of 79c. to me that's not so crazy to get upper 90s at 5ghz, dispite my aio cooler and case fans ? maybe I just REALLY lost the silicon lottery ?
 

zx128k

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Nov 23, 2019
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for shits and giggles I restored stock speeds and ran OCCT LINKPACK test on stock and I got a max temp of 79c. to me that's not so crazy to get upper 90s at 5ghz, dispite my aio cooler and case fans ? maybe I just REALLY lost the silicon lottery ?
Getting high temps is part of overclocking and having very high temps in some stress tests is normal. So long as the temps stay within safe margins then you don't worry. If you were hitting 100c and thermal throttle then dial it back, sometimes avx offsets can help or if you can reduce vcore. If the vrms overheat and the board shuts down then you really have to dial it back.
 
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