Question i7-9700K @5Ghz overclock stability issues?

Jan 5, 2019
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Hey,

I have pretty new rig and i've been trying to get most out of it so i went with overclocking cpu.
I'm having a problem where i happen to crash randomly all the time when playing Escape from tarkov,
game just closes and goes back to windows, no bsod. This happens only after overclocking so i guess
my system is not 100% stable so i'm looking for advice on what direction is should tweak the OC settings.

I feel difference on how the game runs even after "unstable" OC so that's why i want to try keep working on this.
Cinebench r15 gives cpu scores of 1394 stock and 1562 @5Ghz.

My rig:

psu: Fractal design 800w
motherboard: Asus ROG STRIX Z390-F GAMING
cooler: Noctua NH-D15 with double fans.
cpu: i7-9700K
gpu: Asus ROG STRIX GTX 1080
ram: 16Gb Corsair vengeance DDR4 3200mhz

I've looked some other overclock guides on youtube and started from there so here is my..

Current overclock settings:

AI Overclock Tuner: XMP 1
Asus Multicore Enhancement: Disabled
SVID Behaviour: Typical scenario
AVX instruction core ratio negative offset: 0
CPU core ratio: Sync all cores, 50
CPU SVID Support: Disabled
CPU Load-line Calibration: Level 6
CPU current capability: 170%
Intel speedstep: Disabled
CPU C-states: Disabled
Long duration package power limit: 4095
Package power time window: 127
Short duration package power limit: 4095
CPU Core/Cache current limit Max: 255.75
CPU Core/Cache Voltage: Manual
- CPU Core Voltage Override: 1.360V

Cinebench crashes at under 1.320V and OCCT freezes the pc right away
at under 1.350V and even with 1.380V it starts to throw hundreds of errors after 10-15minutes.
Prime95 at 1.360V works for 10-15minutes then one worker stops working.
Temps have been 30-40C idle and 50-68C gaming and up to 83C on 15minutes of prime95.

Also...
Is HWmonitor accurate or bugged in my case, after each time when game has stopped working
and threw me back to windows, i noticed that HWmonitor says cpu core clock max. has peaked
to 5800mhz and once it showed 7284mhz on each core, is that even possible?

Let me know if i forgot to add some critical information.
Thanks beforehand!
- Marko
 

zx128k

Proper
Nov 23, 2019
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Coffee Lake RefreshSSE FrequencyAVX2 FrequencyVcore% Capable
9700K4.90GHz4.70GHz1.337V100%
9700K5.00GHz4.80GHz1.350VTop 90%
9700K5.10GHz4.90GHz1.362VTop 38%
9700K5.20GHz5.00GHz1.375VTop 9%
9700K5.30GHz5.10GHz1.387VTop 1%
Silicon lottery website.

Try a AVX offset of -2, lower the vcore voltage to 1.35 volts and see if that helps. See if you can get the second entry in the table.
 
Jan 5, 2019
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Just tried with AVX offset of -2 and 1.350V @5Ghz.
Tested with Prime95 v26.6 small fft's and pc booted after 10minutes or so...
highest temps were ~84C as far as i noticed. :unsure:
 

zx128k

Proper
Nov 23, 2019
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With my Intel cpu I had to increase vrm switching frequency and LLC to stop reboots. Also sometimes increase vcore. You should get to a point were you just get errors or stopped threads. Prime95 v26.6 is the non avx version if memory serves.

Try 4.9GHz all cores and see if that helps. Keep RAM at stock frequencies.


 
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Jan 5, 2019
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With my Intel cpu I had to increase vrm switching frequency and LLC to stop reboots. Also sometimes increase vcore. You should get to a point were you just get errors or stopped threads. Prime95 v26.6 is the non avx version if memory serves.

Try 4.9GHz all cores and see if that helps. Keep RAM at stock frequencies.
By keeping RAM at stock frequencies do you mean disabling XMP?
My RAM is 3200mhz but disabling XMP downgrades it to 2133mhz?

I'll try 4.9Ghz, should i try first with same 1.350 Volts?

VRM and LLC are new stuff for me along with the whole overclocking, what exactly
i should try changing in BIOS and to what?

Check out HWiNFO64 - sensors only - 'performance limit reasons' section after you get a CTD. You could be hitting a VRM limit.
I downloaded HWinfo64 newest version and found performance limit reasons section.
What am i exactly looking for here after crash? something will turn to YES from NO i guess
if thats the case?

I'll try do some more testing tomorrow if i can, busy with work.

Thanks for the help, appreciate it!
 

zx128k

Proper
Nov 23, 2019
205
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By keeping RAM at stock frequencies do you mean disabling XMP?
My RAM is 3200mhz but disabling XMP downgrades it to 2133mhz?

I'll try 4.9Ghz, should i try first with same 1.350 Volts?

VRM and LLC are new stuff for me along with the whole overclocking, what exactly
i should try changing in BIOS and to what?



I downloaded HWinfo64 newest version and found performance limit reasons section.
What am i exactly looking for here after crash? something will turn to YES from NO i guess
if thats the case?

I'll try do some more testing tomorrow if i can, busy with work.

Thanks for the help, appreciate it!
When you overclock its advised to overclock one part of the system at a time. Usually RAM is the last part to be overclocked. You don't want unstable RAM to affect your overclock as you increase frequency. A RAM overclock can be stable at one frequency but then unstable at a higher core frequency.
 
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