Stability and overclocking - what do you consider stable

Discussion in 'Overclocking & Cooling' started by thecold, Dec 30, 2019.

  1. thecold

    thecold Limp Gawd

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    I've seen various definitions of stability.

    Some people will call prime95 11 minutes stable. Others will run a few Cinebench r20's and call it good. This a screenshot of my pc running an antivirus full system scan on my intel p3700. Notice the max temperature. It's actually higher than some AVX2 Blender loads on my desktop (bmw in this example). This blender load generally sits at 72-74c after heavy pre-loading.

    Cinebench is a bit higher at about 2 degree's higher. This is after looping it for about 20 minutes (this was for temperature, not for stability).

    My personal opinion is that if it's not stable with multiple stress tests for long periods of time, It's not stable.

    What do you consider stable?

    Before I take stability overclock screenshots seriously, it needs to be at least a couple hours.
     

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  2. VanGoghComplex

    VanGoghComplex [H]ard|Gawd

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    If it doesn't crash when I'm using it, it's stable (so far.)
     
  3. chameleoneel

    chameleoneel 2[H]4U

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    No errrors in RAM tests. I do two RAM tests. One before windows boots, which usually returns problems within 30 seconds. and one while windows is running, which I run over night.

    20 passes of prime 95 small FFT

    completes a 5+ minute handbrake job without crashing/freezing

    and then after that......basically never randomnly crashing from whatever I might be doing. It can still happen, despite stress tests.
     
    Last edited: Jan 1, 2020
  4. theonedub

    theonedub n00b

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    ~5hrs OCCT and I consider it good to go. Then load it with WCG BOINC WUs and check it for returned errors for a week or so. Then it's rock solid.
     
  5. Dajinn

    Dajinn [H]Lite

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    Intel burn test on very high or maximum for me @ 5 to 10 passes without issue is my personal indicator.
     
  6. THRESHIN

    THRESHIN 2[H]4U

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    11 minutes stable? I don't know many computers that can encode high quality h265 in 11 minutes. Stables means it NEVER crashes due to the overclock. Granted, to truly achieve this you'd need to run your stress test infinitely. Obviously a compromise is needed.

    Myself, I run my stress test overnight and once I have the settings I think are final I'll usually run for 24 hours. At that point, the chances of crashing due to overclock is almost nothing.

    I have often found stability issues in these marathon tests. Even after 3 or 4 hours. Usually all it takes is a very minor tweak to correct. I'm also not interested in bragging about how high I was able to push it. I'm in it purely for the free performance boost. 50Mhz or less isn't going to be missed.
     
  7. M76

    M76 [H]ardForum Junkie

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    I consider stable what never crashes during usage.
    Stress tests are only good for giving you a general idea about the overclock's viability, not for actual stability testing. It is stable when it doesn't crash in any workload I put to it, not when prime or whatever says it's stable.
     
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  8. freeagentt

    freeagentt [H]Lite

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    Your computer is nothing more than a powerful calculator. When you run an unstable oc, it goes from being a calculator to a random number generator. Make sure you make good numbers lol.
     
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  9. viivo

    viivo [H]ard|Gawd

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    I've been thinking about this while looking for optimal memory speed and timings. Basically, if Firefox doesn't crash with a bunch of open tabs and I get no CRC errors while extracting files, I move on to the first few MemTest tests. If it passes those it's probably stable enough for anything I'll ever do.
     
  10. Furious_Styles

    Furious_Styles [H]ard|Gawd

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    For me it's not a particular stress test. Usually I will do many of them but the gold standard is uptime. Can I do all that I normally do and not restart for a month? If so I consider it good.
     
  11. mikeo

    mikeo Gawd

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    24h prime95 stable used to be the standard, I still go with that.
     
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  12. Mega6

    Mega6 2[H]4U

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    idk about 24hr but prime95 until you're satisfied and don't crash.
     
  13. mikeo

    mikeo Gawd

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    I haven't pushed my new build yet but on my old one I've had prime95 detect errors after 18 hours.
     
  14. Mega6

    Mega6 2[H]4U

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    I ran prime95 for five minutes and it's good. Gets pretty boring watching the system thermally throttle down. As long as I can see that, there's little point in continuing.
     
    Last edited: Jan 11, 2020
  15. FlawleZ

    FlawleZ Gawd

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    Post? Check.
    Boot to desktop? Check.
    Finish SuperPi 1M? Check.

    Stable enough in my book.
     
  16. larrymoencurly

    larrymoencurly [H]ard|Gawd

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    I can't get 2 different RAM diagnostics to find bad bits in 24 hours of testing with each, at a computer case temperature of 40 Celcius or with the RAM heatsink or chip packages at 50-60C.
     
  17. Farkle

    Farkle Lurker

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    MemTestx86+ with test 5 and 8 for 2 passes each (to dial in settings)
    9 hours memory testing, all tests (after settings are perceived stable)
    Cinebench 3 hours (Furmark+Prime95 concurrently for 4 hours for older systems)
    48 hours Prime95 blend

    If the system is going to be contributing to a distributed project, I also throw in a weekend of Linpack just to be sure. Every 3 months, when I update my monitor calibrations, I usually run Cinebench again overnight to determine if the system is still operating within spec.
     
  18. thesmokingman

    thesmokingman [H]ardness Supreme

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    You know... the first 5-10 minutes of P95 is just self testing.
     
  19. thecold

    thecold Limp Gawd

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    Your stability tests are awesome. That's all I have to say.
     
  20. Mega6

    Mega6 2[H]4U

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    so what. It's testing, loading the cpu and checking for errors.
     
    Last edited: Jan 15, 2020 at 3:20 PM
  21. thesmokingman

    thesmokingman [H]ardness Supreme

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    Huh? I don't get your attitude. It's a self test, it hasn't even begun to load the cpu. Now not sure your stance since you don't seem to give a shit either way with a 5 minute run. Point is, it hasn't even begun load testing.
     
  22. Mega6

    Mega6 2[H]4U

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    Don't act like a know-it-all and you will get less attitude. I can read a cpu utilization graph along with the cpu temps. It's loading the CPU.self-test or not.
     
    Last edited: Jan 15, 2020 at 4:13 PM
  23. thesmokingman

    thesmokingman [H]ardness Supreme

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    You have some issues man.
     
  24. Mega6

    Mega6 2[H]4U

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    My issue is people stating incorrect things and not even taking one minute to look for themselves at what is going on.

    is the cpu loaded? YES

    is the cpu heating up? YES

    is the os/computer/prime95 stable? YES

    Self-test or not - DOESN'T MATTER.

    Empirical evidence suggests this is several ways. What evidence do you have that the self-test mode does NOT constitute a load test on the cpu? As far as I can tell, you read "self-test" and made a bad assumption - by being ignorant of the system status.
     
    Last edited: Jan 15, 2020 at 4:45 PM
  25. thesmokingman

    thesmokingman [H]ardness Supreme

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    Ugh, you're full of shit if you ar4e telling us 5 minutes of prime proves stability. Like I wrote, you're just trolling now cuz 5 minutes of p95 doesn't prove jack shit.
     
  26. Mega6

    Mega6 2[H]4U

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    I'm telling you that you stating "test-mode" does not stress the cpu and you are full of shit. Stop changing your argument from "test-mode doesn't load the cpu" to "a five minute test doesn't prove stability". Stability testing is obviously subjective. I am not even going there. Load test the way you want, I don't care.

    Stating the P95 self-test doesn't load the system is a misinformed lie.

    LOOKS LOADED TO ME

    upload_2020-1-15_17-46-11.png

    upload_2020-1-15_17-46-30.png
     
    Last edited: Jan 15, 2020 at 5:54 PM
  27. Skylinestar

    Skylinestar Limp Gawd

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    >100 hours of GTA V, Witcher3, ME Andromeda, Prime95, AIDA 64, OCCT - rock stable.
    PUBG - BSOD.
    ???
    I don't know what to believe anymore.
     
  28. Mega6

    Mega6 2[H]4U

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    Believe this - pugb is a very poorly coded game. Do you remember the cause of the BSOD? Page Fault?
     
  29. Furious_Styles

    Furious_Styles [H]ard|Gawd

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    Haha I was going to post the same thing, those devs are a complete joke. However it has been a while since I played it, when I did last (early 2019) it did not crash nor crash the entire system.
     
  30. Skylinestar

    Skylinestar Limp Gawd

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    Only in PUBG. CLOCK_WATCHDOG_TIMEOUT. No amount of vcore can fix it.
     
  31. Mega6

    Mega6 2[H]4U

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    drop your multiplier if overclocked.
     
  32. King_Potato

    King_Potato n00b

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    2 kinds of stable.

    1. OC to beat a Record- prime 95 for a few minutes maybe 1 pass with memtest86+ or skip this altogether and just start benchmarking.
    2. OC to use long term- prime 95 5+hours, 4-8 passes with memtest86+ 0 errors at the very least.
     
  33. Meeho

    Meeho [H]ardness Supreme

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    24 h Prime95
    8 h RealBench stress + 10 benchmark passes
    >400% memtest
    real life usage
     
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  34. freeagentt

    freeagentt [H]Lite

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    I've seen prime fail after 24 hours, or have had issues regardless of it passing, so to me, prime95 is a complete waste of time. I haven't used memtest in at least a decade :D

    I used to use IntelBurnTest, now I run Linpack Xtreme for testing cpu and mems for 24/7 oc. If not for 24/7 if it passes the bench with a better score than before its a win.
     
  35. beheo2019

    beheo2019 n00b

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    Occt linpack 2019 destroys so many “ stable” systems.
     
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  36. MaZa

    MaZa 2[H]4U

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    For quick check if my memory clocks and timings are even remotely viable, 1 pass Memtest86. For checking if it is actually stable, overnight of HCI Memtest through the DRAM calculator, something like 2000% for all threads.

    For CPU it is 12 hours of latest version Prime95, Small FFTs with AVX. And another 12 hours of Prime95 Large FFT to add some memory and memory controller stability testing in the mix. That said, now that I am on Ryzen 2 this is all prettty pointless because you cannot overclock the damn things in any meaningful way. I just enabled PBO and clock override, applied a mild 0.050v undervolt offset to keep the runaway volts and temps in check and CPU handles the rest. Booooring....

    Anyway, I OC my rig to use it. I don't want my files get corrupted just because my ram is falling apart or my CPU, as someone pointed out, becomes a "random number generator" in a wrong place at wrong time.