14th gen Intel stability issues ON LATEST BIOS & MICROCODE.

[HelpMyComputerIsBroke]

Hello, I don't have much time to write here since my computer randomly shuts down:

tl;dr:
i7-14700K, MSI Z790-P Wifi, 32 GB DDR5-6000 [NEW COMPONENTS]

 

RTX 3080 Ti, 1000W Corsair RM1000x, same storage [OLD COMPONENTS, BATTLE TESTED AND FINE]

 

When i started I didnt have the right backplate for my AIO, so I bent the LGA 1200 backplate until two opposite corners fit

The cooler could dissipate ~235W before throttling.

Today I got the proper backplate, installed it, and now my PC randomly shuts down

I am monitoring temps, they are fine
The first time I tried to run cinebench 2025 on all P cores, it shutdown before starting
Second time, it nearly finished with ~1100 points likely before shutting down

I am 100% aware of 14th gen issues so the moment this setup posted when I first started I updated BIOS 
I have not overclocked
I keep it at the "Intel Default Settings" in the BIOS which limits to 250W or so.

What do I do?
Temps are fine.

[HelpMyComputerIsBroke]

Just now, HelpMyComputerIsBroke said:

Second time, it nearly finished with ~1100 points likely before shutting down

* Nearly finished one pass before shutting down
Not close to finishing all 10 minutes

[HelpMyComputerIsBroke]

**I am on Arch Linux with intel-ucode installed
Journalctl doesn't report anything before shutdowns.

[HelpMyComputerIsBroke]

*** Turns out, I did not have intel-ucode (Intel Microcode package in arch linux) installed
Microcode should still be provided by the bios
Will install and report back

[OddOod]

Can you try running furmark (or whatever synthetic GPU load program works on arch) to check for a power stability issue? I assume the lack of a journal entry is similar to a windows BSOD

[HelpMyComputerIsBroke]

13 minutes ago, OddOod said:

Can you try running furmark (or whatever synthetic GPU load program works on arch) to check for a power stability issue? I assume the lack of a journal entry is similar to a windows BSOD

journalctl is more like Windows Event Viewer
Linux does have something similar to a BSOD called a Kernel Panic but that would be logged (and is very rare on linux).

I ran the following benchmarks:
On the host: FurMark (GL) 1080p on the iGPU
FurMark (GL) 1080p using multicore software rendering (LLVMPipe) (didn't seem to totally stress out the CPU but did result in ~85 C on P cores and high 70s on E cores)

In a VM:
FurMark (GL) at 1440p benchmark on the RTX 3080 Ti

The PC sustained this in total for atleast a few minutes (and the software renderer lasted longer as I started that one first) before rebooting.

Journalctl shows nothing (which means it likely isn't the OS or Kernel causing the reboot)

Temps seemed to be fine even up until the reboot

So I'm not sure
The CPU should be locked to the Intel default 250W and this happens even when the RTX 3080 Ti is completely inactive (in fact, it wasn't active until this test and didn't happen any sooner or later).

No one core is getting hotter than any other.

I have all fans set to max throttle (which would include the AIO pump) and I still get crashes. (Before they were at default curves)

[HelpMyComputerIsBroke]

I ran Cinebench 2025 until it shutdown and logged the output of the sensors.

Here is the last sensor reading before crashing, it looks like it shutdown right as Cinebench finished a pass.

 

Although it is worth noting that it does still randomly reboot under basically no load

 

iwlwifi_1-virtual-0
Adapter: Virtual device
temp1:        +35.0°C
 
spd5118-i2c-11-53
Adapter: SMBus I801 adapter at 0000:00:1f.4
temp1:        +40.0°C  (low  =  +0.0°C, high = +55.0°C)
                       (crit low =  +0.0°C, crit = +85.0°C)
 
acpitz-acpi-0
Adapter: ACPI interface
temp1:        +27.8°C
 
nct6687-isa-0a20
Adapter: ISA adapter
VIN0:           992.00 mV (min =  +0.00 V, max =  +0.00 V)
VIN1:           992.00 mV (min =  +0.00 V, max =  +0.00 V)
VIN2:             1.31 V  (min =  +0.00 V, max =  +0.00 V)
VIN3:           128.00 mV (min =  +0.00 V, max =  +0.00 V)
VIN4:           560.00 mV (min =  +0.00 V, max =  +0.00 V)
VIN5:           800.00 mV (min =  +0.00 V, max =  +0.00 V)
VIN6:             1.07 V  (min =  +0.00 V, max =  +0.00 V)
VIN7:             1.52 V  (min =  +0.00 V, max =  +0.00 V)
VCC:              3.30 V  (min =  +0.00 V, max =  +0.00 V)
fan1:              0 RPM  (min =    0 RPM)
fan2:              0 RPM  (min =    0 RPM)
fan3:              0 RPM  (min =    0 RPM)
fan4:           1408 RPM  (min =    0 RPM)
fan5:           1195 RPM  (min =    0 RPM)
fan6:            894 RPM  (min =    0 RPM)
fan7:              0 RPM  (min =    0 RPM)
fan8:           2120 RPM  (min =    0 RPM)
fan9:              0 RPM  (min =    0 RPM)
fan10:             0 RPM  (min =    0 RPM)
PECI 0.0:        +96.5°C  (low  =  +0.0°C)
                          (high =  +0.0°C, hyst =  +0.0°C)
                          (crit =  +0.0°C)  sensor = Intel PECI
Diode 0 (curr):  +39.0°C  (low  =  +0.0°C)
                          (high =  +0.0°C, hyst =  +0.0°C)
                          (crit =  +0.0°C)  sensor = thermal diode
Thermistor 15:   +58.0°C  (low  =  +0.0°C)
                          (high = +122.0°C, hyst = +22.0°C)
                          (crit =  +0.0°C)  sensor = thermistor
PCH CHIP:        +50.0°C  (low  =  +0.0°C)
                          (high =  +0.0°C, hyst =  +0.0°C)
                          (crit =  +0.0°C)
Thermistor 16:   +62.5°C  (low  =  +0.0°C)
                          (high =  +0.0°C, hyst =  +0.0°C)
                          (crit =  +0.0°C)  sensor = thermistor
Thermistor 0:    +37.0°C  (low  =  +0.0°C)
                          (high =  +0.0°C, hyst =  +0.0°C)
                          (crit =  +0.0°C)  sensor = thermistor
Thermistor 1:    +22.0°C  (low  =  +0.0°C)
                          (high =  +0.0°C, hyst =  +0.0°C)
                          (crit =  +0.0°C)  sensor = thermistor
pwm1:               128%
pwm2:               128%
pwm3:                76%
pwm4:                76%
pwm5:                76%
pwm6:                76%
pwm7:                76%
pwm8:                76%
intrusion0:     OK
beep_enable:    disabled
 
coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +86.0°C  (high = +80.0°C, crit = +100.0°C)
Core 0:        +66.0°C  (high = +80.0°C, crit = +100.0°C)
Core 4:        +67.0°C  (high = +80.0°C, crit = +100.0°C)
Core 8:        +66.0°C  (high = +80.0°C, crit = +100.0°C)
Core 12:       +73.0°C  (high = +80.0°C, crit = +100.0°C)
Core 16:       +68.0°C  (high = +80.0°C, crit = +100.0°C)
Core 20:       +86.0°C  (high = +80.0°C, crit = +100.0°C)
Core 24:       +67.0°C  (high = +80.0°C, crit = +100.0°C)
Core 28:       +68.0°C  (high = +80.0°C, crit = +100.0°C)
Core 32:       +63.0°C  (high = +80.0°C, crit = +100.0°C)
Core 33:       +63.0°C  (high = +80.0°C, crit = +100.0°C)
Core 34:       +63.0°C  (high = +80.0°C, crit = +100.0°C)
Core 35:       +63.0°C  (high = +80.0°C, crit = +100.0°C)
Core 36:       +65.0°C  (high = +80.0°C, crit = +100.0°C)
Core 37:       +65.0°C  (high = +80.0°C, crit = +100.0°C)
Core 38:       +65.0°C  (high = +80.0°C, crit = +100.0°C)
Core 39:       +65.0°C  (high = +80.0°C, crit = +100.0°C)
Core 40:       +59.0°C  (high = +80.0°C, crit = +100.0°C)
Core 41:       +59.0°C  (high = +80.0°C, crit = +100.0°C)
Core 42:       +59.0°C  (high = +80.0°C, crit = +100.0°C)
Core 43:       +59.0°C  (high = +80.0°C, crit = +100.0°C)
 
spd5118-i2c-11-51
Adapter: SMBus I801 adapter at 0000:00:1f.4
temp1:        +40.8°C  (low  =  +0.0°C, high = +55.0°C)
                       (crit low =  +0.0°C, crit = +85.0°C)
 
nvme-pci-0200
Adapter: PCI adapter
Composite:    +40.9°C  (low  =  -5.2°C, high = +79.8°C)

 

[HelpMyComputerIsBroke]

I ran memtest86+ a couple times. 
Didn't get any errors but it still shutdown after 6 or so minutes each time.

[xg32]

6 hours ago, HelpMyComputerIsBroke said:

.

if the shutdowns are random i'd have to assume it's the cpu, there was always a risk of the microcodes not completely fixing the problem, one thing you can try is to disable e-cores and see if it helps.

[Pusbucket]

8 hours ago, HelpMyComputerIsBroke said:

 

When i started I didnt have the right backplate for my AIO, so I bent the LGA 1200 backplate until two opposite corners fit

 

maybe you broke something, ever consider that?

[HelpMyComputerIsBroke]

9 minutes ago, jmwhite33 said:

maybe you broke something, ever consider that?

It worked up until I switched to the real LGA 1700 backpalte. I don't see how I could have damaged anything in that process.
Also it's unlikely I damaged anything, the backplate was just plastic and I didn't do any obvious damage.

I suspect that maybe the CPU didn't like being at it's max 250W default turbo at all and the reason I didn't get it initially was because although the AIO had contact, it was just barely unable to reach 250W sustained (230W before throttling).

 

Anyway, I found the solution.
It's called: returning the motherboard (fuck amazon btw), new motherboard is working fine under sustained maximum default turbo.