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i5-8600k unstable cpu overclock/crashes no matter what

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post #21 of 23 (permalink) Old 09-03-2019, 12:17 PM
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vdroop is normal. don't try to remove it. it's there to help smooth out spikes of voltage (spikes you can't see in software sensors; you have to use an oscilliscope) because the VRM can't react as fast as a cpu load can fluctuate. If you're pushing dangerous voltages, it may help to flatten the curve a little in order to run less idle voltage, but having a flatter curve usually means you are setting a lower voltage, which means even lower voltage during sudden load transients which can freeze the system. if you are running high voltage with a flat curve, then you send even higher voltage transients when a load disappears.

you are saying you are still getting crashes. have you established that you get no crashes when running fully stock? you might not have read my last post. You can't establish what is causing the problem because you changed umpteen setting willy nilly and now you don't know why it's crashing. If you run default settings and establish it's fully stable, then change 1 setting at a time and establish it is still stable, then you repeat until it's running at the speed you want while stable.

your crashes are random and intermittent, so you can't expect this process to be fast. 30 minute tests between each change may be fine for benchmark-levels of overclock but not for 24/7 operation. you need to establish that the system is, without a doubt, stable. this will take a long time to do properly, otherwise you'll either have to just run a mild and safe overclock (or none at all), or deal with crashes/freezes with an untested overclock.

Intel Core i9-9900k (Silicon Lottery 5.1GHz @ 5.3GHz 1.36 VCore)
ASUS ROG MAXIMUS XI APEX
G.SKILL F4-4000C19D-32GTZSW (2x16GiB 4000MHz 19-19-19-39 2T, tuned to 4133MHz 14-17-17-31 2T)
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Last edited by ssateneth; 09-03-2019 at 12:23 PM.
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post #22 of 23 (permalink) Old 09-04-2019, 02:44 AM - Thread Starter
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Quote: Originally Posted by BroadPwns View Post
Unless you're using memtest86 7.2.0 and Modulo very long run - use HCI Memtest.
Ran HCI Memtest for 4 hours, no errors whatsoever. Will attach an image of the results.


Quote: Originally Posted by ssateneth View Post
vdroop is normal. don't try to remove it. it's there to help smooth out spikes of voltage (spikes you can't see in software sensors; you have to use an oscilliscope) because the VRM can't react as fast as a cpu load can fluctuate. If you're pushing dangerous voltages, it may help to flatten the curve a little in order to run less idle voltage, but having a flatter curve usually means you are setting a lower voltage, which means even lower voltage during sudden load transients which can freeze the system. if you are running high voltage with a flat curve, then you send even higher voltage transients when a load disappears.

you are saying you are still getting crashes. have you established that you get no crashes when running fully stock? you might not have read my last post. You can't establish what is causing the problem because you changed umpteen setting willy nilly and now you don't know why it's crashing. If you run default settings and establish it's fully stable, then change 1 setting at a time and establish it is still stable, then you repeat until it's running at the speed you want while stable.

your crashes are random and intermittent, so you can't expect this process to be fast. 30 minute tests between each change may be fine for benchmark-levels of overclock but not for 24/7 operation. you need to establish that the system is, without a doubt, stable. this will take a long time to do properly, otherwise you'll either have to just run a mild and safe overclock (or none at all), or deal with crashes/freezes with an untested overclock.
I am taking your advice and started literally from 0. Just reset BIOS to factory settings and didn't change a thing and let run prime95 for 30minutes on stock, no errors nor freezes. Also deliberately started and stopped prime95 5 times to make sure that it doesn't crash when the load eases(it always froze when I did this). Just now increased Clock rate to 4.8GHz and Vcore to 1.360, ran it for 30minutes, everything went smooth, also did start and stop prime95 5 times. Now I will do some gaming to see whether everything is ok under realistic loads as previously prime95 passed but froze when gaming.

To make it clear, the only BIOS settings I have changed so far are;
OC Explore Mode > Expert
CPU Ratio > 48
CPU Ratio Mode > Fixed
CPU Core Voltage > 1.350 (HWInfo reports 1.360)
Intel C-State > Disabled

I'm not planning to run my system 24/7 and never have done so.

Quote: Originally Posted by shilka View Post
Crap i almost forgot as you should be aware that the GPU you have wont work with early models of the Seasonic Focus Plus so if you get one that is old stock you are going to have a ton of problems with the GPU since the Asus GTX 970 Strix specifically had problems with the Seasonic Focus Plus

Seasonic addressed the issue and newer models should not have that problem so you should check when it was made before installing it
Or you could replace the GPU since its old anyway
How do I check when it was made? Although haven't experienced a GPU failure so far.
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Last edited by Senotajs; 09-04-2019 at 02:55 AM.
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post #23 of 23 (permalink) Old 09-04-2019, 05:46 AM
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