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Computer reset/boot after overclock

 
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post #1 of 5 (permalink) Old 04-19-2019, 07:43 AM - Thread Starter
Orishlez
 
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Computer reset/boot after overclock

z390, aorus master, Osx mojave.
First time overclocking, i've overclocked it according the it's manual: https://www.gigabyte.com/FileUpload/...le/525/946.pdf

It could last days with intensive work (cubase/audio), but then it could boot suddenly.. on nothing at all, like watching a video on chrome.. on a press of a button, maybe it's unrelated to what i'm doing.

How can i debug this? what should i change on the bios?
would appreciate any help or direction of thought.
thanks!
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post #2 of 5 (permalink) Old 04-19-2019, 07:52 AM
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Could you please list the specs of your computer (cpu, memory, psu, would be most important). Also are you using an auto overclocking feature within the bios or are you changing the CPU multiplier and changing voltages manually? Have you overclocked your memory?

It's hard for anyone to help you diagnose the problem without listing your process/settings.

Steins Gate
(16 items)
CPU
i7 8700k
Motherboard
EVGA Z390 Dark
GPU
Radeon 7
RAM
2x8GB DDR4 3600 c17 @ 4300 c19 2T
Hard Drive
960 Evo
Hard Drive
850 Evo
Power Supply
EVGA 750w G2
Cooling
Thermalright True Spirit 140 Direct
Case
Fractal Design S2
Monitor
Acer ed323qur
Keyboard
CM MK Pro S
Mouse
G703
Mousepad
Logitech Powerplay
Audio
Polk tsi 100
Audio
HD518
Audio
Topping MX3
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post #3 of 5 (permalink) Old 04-19-2019, 02:45 PM - Thread Starter
Orishlez
 
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Specs are:
Intel Core i9 9900K
Gigabyte Z390 AORUS Master
Corsair DDR 4 32G (16Gx2) 3000 CL16 Vengeance LPX Black
Noctua NH-D15 CPU Cooler
Corsair CX650 650W PSU 80+ Bronze

Please see my bios screenshots:

Thanks!!
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post #4 of 5 (permalink) Old 04-19-2019, 03:53 PM
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Your first going to want to set everything back to stock and run a stability test that's supported on Mojave, I'm guessing Prime 95 may be the go to here (never dealt with this OS). Running a blend test for 4-8 hours while keeping an eye of temperatures with a HW monitoring software.

Your CPU is probably fine at stock settings, so you'll first want to check if your ram is stable at both stock (2133 jedec standard, or auto in the memory tab settings) and xmp settings. I'm not familiar with any memory stress test software for a Mojave so you may want to check this link/software out.

So in terms of a general process:

1) Set everything to stock, run a memory testing software with your memory set to auto/jedec standard 2133

If it passes -> set your memory to XMP and repeat step 1

If it fails -> you more than likely have a bad memory kit

2) Once you know your memory is stable you can begin to overclock your CPU (set your memory back to the auto setting/jedec standard while looking for a CPU overclock). If you have a target of 5ghz, set your multiplier/cpu ratio to 50 and disable spread spectrum (Advanced CPU Core Settings Menu); you may also have to set an AVX offset depending on temperatures or based upon what program you end up using to check system stability. Then set a starting voltage, for example the 1.3v you chose.

Run Prime 95 on blend with the above settings for 4-8 hours; pay attention to CPU temperatures and make sure there is no throttling/excessive temps (85c+)

If it fails/you get errors -> you need more vcore, increase in 20mV steps and rerun until you find a stable setting; if you are still failing and you are throttling/temps are exceeding 90c+ you will have to reduce your multiplier down to 49x and start back at 1.3v

If it passes -> reduce your vcore by 20mV steps until you can no longer pass your stress test/P95 for 8hrs without error -> once you've completed this you will have found the minimum required voltage for your overclock.

3) Once you've found a stable cpu multi/ratio and vcore required to be stable, you can now set your memory to XMP and retest both your CPU and Memory.

If you fail either in P95 or memtest -> you may need more vcore, more vccio, more vccsa, or a combination of all 3.

a) Start by increasing VCCIO/VCCSA to 1.1v, and rerun P95 on blend,

If you pass reduce VCCIO/VCCSA in 10-20mV steps until you find the minimum required VCCIO/VCCSA.

b) increase VCCIO/VCCSA or Vcore in 10-20mV steps until you find a stable combination of voltages - DO NOT exceed 1.25v on either VCCIO or VCCSA (you shouldn't need more than stock (1.05vccsa and 0.950 vccio) or up to 1.1v for either voltage with a DDR3000 kit).

If you pass both CPU and memory tests -> Congratulations your system is stable.

Once you've found a stable overclock, if you still have issues that seem to directly relate to specific programs or actions on your PC you may need to further diagnose different parts with stock settings.

You'll find a lot of helpful information in the Z390 Gigabyte Thread, it will also be a great resource for asking questions.

Again, I'm NOT familiar with stress testing software on Mac based OS's so someone may chime in with better software options. The general overclocking process will remain the same however, you'll just be using different software to stress test your system.

Steins Gate
(16 items)
CPU
i7 8700k
Motherboard
EVGA Z390 Dark
GPU
Radeon 7
RAM
2x8GB DDR4 3600 c17 @ 4300 c19 2T
Hard Drive
960 Evo
Hard Drive
850 Evo
Power Supply
EVGA 750w G2
Cooling
Thermalright True Spirit 140 Direct
Case
Fractal Design S2
Monitor
Acer ed323qur
Keyboard
CM MK Pro S
Mouse
G703
Mousepad
Logitech Powerplay
Audio
Polk tsi 100
Audio
HD518
Audio
Topping MX3
▲ hide details ▲

Last edited by rv8000; 04-19-2019 at 04:09 PM.
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post #5 of 5 (permalink) Old 04-19-2019, 04:03 PM
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There is an app for cpu stress test for OS X as well as memtest.

CPU stress test http://www.coolbook.se/CPUTest.html
Memtest http://www.kelleycomputing.net/rember/

Use at your own risk, of course.

Edit: If CPUTest doesn't work, here's the Prime95 https://www.mersenne.org/download/. I checked the OS X version on my macbook air and it worked fine.

Last edited by Melan; 04-19-2019 at 04:29 PM.
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