u/SeesawFit9056

System Specs:

​CPU: AMD Ryzen 7 7800X3D

​Motherboard: MSI PRO B850-P WIFI (BIOS version currently running: 2.A92 / AGESA ComboAm5PI 1.30.1b PatchA)

​RAM: 32GB (2x16GB Dual-Rank) Patriot Viper 6000MT/s CL30

​Primary Issue: Persistent random system reboots / Kernel-Power Event 41 crashes under load/idle transitions, paired with intermittent MEMORY_MANAGEMENT (0x1a) and KERNEL_DATA_INPAGE_ERROR BSODs.

​What We Tested & What Happened

​1. Automated EXPO Profile (Out of the Box)

​Settings: Default EXPO profile enabled (6000 MT/s CL30, auto voltages, auto sub-timings).

​Result: Triggers random Event 41 reboots, 0x1a page-fault errors, and inpage data corruption crashes under standard Windows usage.

​2. Manual Voltage Constraints (Targeting SoC & VDDIO)

​Settings Applied:

​Lowered VSOC from automatic 1.25V–1.30V down to 1.200V / 1.250V to combat heat and controller stress.

​Matched CPU VDDIO to VSOC (1.200V / 1.250V).

​Kept MEM VDD / VDDQ locked at kit specification 1.350V.

​Disabled Power Down Mode (to stop idle sleep-state Event 41 drops).

​Result: While it initially posted successfully on a single stick (slot A2), subsequent boots and dual-channel configurations resulted in MEMORY_MANAGEMENT (0x1a) errors.

More critically, attempting to input manual voltage values or navigate certain fields frequently caused the UEFI/BIOS itself to hard-freeze, forcing a CMOS clear via JBAT1.

​3. Single-Stick Isolation & JEDEC Baselines

​Settings Applied: Dropped down to a single stick in A2, tested pure factory JEDEC speeds, and tested manual adjustments without touching advanced ODT/CAD bus parameters.

​Result: The system still exhibited instability or hardware-level BIOS freezing during minor firmware adjustments, indicating potential microcode/training handshake sensitivity on this specific MSI board revision with dual-rank ICs.

​Any insights from those running similar MSI AM5 boards with dual-rank Hynix kits would be greatly appreciated!

The Problem:

My PC is suffering from sudden, random, instantaneous black-screen shut-offs. There is no BSOD, no stuttering, and no freezing. The system just violently loses power or hard reboots, and Windows logs a Critical Kernel-Power Event 41. It usually happens anytime, it could be with or without load, newly boot or 2 hrs after boot, it can be completely unpredictable.

The Specs (Everything is newly bought):

CPU: AMD Ryzen 7 9700X

Motherboard: MSI B850-P

GPU: Gigabyte RX 9060 XT

RAM: DDR5 (2 sticks x 16 gb viper 6000)

PSU: 1000W AORUS Platinum

I have spent days systematically isolating variables. Here is what I have already ruled out:

It is not the Power Supply: I thought the PSU was tripping, so I went from a Corsair, to a Seasonic, and finally to this brand new 1000W AORUS Platinum. The exact same crashes happen on all three units.

It is not the UPS or Wall Power: I completely bypassed my UPS and plugged the PC directly into the wall socket to rule out dirty power. Still crashed.

It is not an Accessory Short: I completely removed my aftermarket Lian Li ARGB fan controller and stripped all unnecessary front-panel case cables (Reset SW, LEDs) to rule out a 5V short to the chassis. Still crashed.

It is not outdated Firmware: I updated the BIOS.

I have aggressively tested the RAM: I have cleared the CMOS (battery removed for 5+ mins), tested the RAM with EXPO on, EXPO off, and even tried booting and running with just a single stick in the A2 slot. No memory BSODs or error messages.

The AM5 Memory Training Loop: Half the time, after it hard-crashes, it gets stuck on the red and yellow motherboard debug lights and refuses to post until I clear the CMOS again.

My Questions for the Experts:

At this point, since the PSU and external power are ruled out, am I looking at a defective memory controller on the 9700X, or a physically defective MSI motherboard? By the way I've tried 2 different brand new MSI motherboards, still the same.

How do I definitively test whether it's the CPU or the Motherboard causing the total power loss without just blindly buying replacement parts? I've done OCCT stress tests showing that my temps are normal. I've also tried different GPUs, still the same.

I can no longer RMA for replacement.

Any help or theories would be massively appreciated. I just want to use my PC!

The Problem:

My PC is suffering from sudden, random, instantaneous black-screen shut-offs. There is no BSOD, no stuttering, and no freezing. The system just violently loses power or hard reboots, and Windows logs a Critical Kernel-Power Event 41. It usually happens anytime, it could be with or without load, newly boot or 2 hrs after boot, it can be completely unpredictable.

The Specs (Everything is newly bought):

CPU: AMD Ryzen 7 9700X

Motherboard: MSI B850-P

GPU: Gigabyte RX 9060 XT

RAM: DDR5 (2 sticks x 16 gb viper 6000)

PSU: 1000W AORUS Platinum

I have spent days systematically isolating variables. Here is what I have already ruled out:

It is not the Power Supply: I thought the PSU was tripping, so I went from a Corsair, to a Seasonic, and finally to this brand new 1000W AORUS Platinum. The exact same crashes happen on all three units.

It is not the UPS or Wall Power: I completely bypassed my UPS and plugged the PC directly into the wall socket to rule out dirty power. Still crashed.

It is not an Accessory Short: I completely removed my aftermarket Lian Li ARGB fan controller and stripped all unnecessary front-panel case cables (Reset SW, LEDs) to rule out a 5V short to the chassis. Still crashed.

It is not outdated Firmware: I updated the BIOS.

I have aggressively tested the RAM: I have cleared the CMOS (battery removed for 5+ mins), tested the RAM with EXPO on, EXPO off, and even tried booting and running with just a single stick in the A2 slot. No memory BSODs or error messages.

The AM5 Memory Training Loop: Half the time, after it hard-crashes, it gets stuck on the red and yellow motherboard debug lights and refuses to post until I clear the CMOS again.

My Questions for the Experts:

At this point, since the PSU and external power are ruled out, am I looking at a defective memory controller on the 9700X, or a physically defective MSI motherboard? By the way I've tried 2 different brand new MSI motherboards, still the same.

How do I definitively test whether it's the CPU or the Motherboard causing the total power loss without just blindly buying replacement parts? I've done OCCT stress tests showing that my temps are normal. I've also tried different GPUs, still the same.

I can no longer RMA for replacement.

Any help or theories would be massively appreciated. I just want to use my PC!

​

The Problem:

My PC is suffering from sudden, random, instantaneous black-screen shut-offs. There is no BSOD, no stuttering, and no freezing. The system just violently loses power or hard reboots, and Windows logs a Critical Kernel-Power Event 41. It usually happens anytime, it could be with or without load, newly boot or 2 hrs after boot, it can be completely unpredictable.

The Specs (Everything is newly bought):

CPU: AMD Ryzen 7 9700X

Motherboard: MSI B850-P

GPU: Gigabyte RX 9060 XT

RAM: DDR5 (2 sticks x 16 gb viper 6000)

PSU: 1000W AORUS Platinum

I have spent days systematically isolating variables. Here is what I have already ruled out:

It is not the Power Supply: I thought the PSU was tripping, so I went from a Corsair, to a Seasonic, and finally to this brand new 1000W AORUS Platinum. The exact same crashes happen on all three units.

It is not the UPS or Wall Power: I completely bypassed my UPS and plugged the PC directly into the wall socket to rule out dirty power. Still crashed.

It is not an Accessory Short: I completely removed my aftermarket Lian Li ARGB fan controller and stripped all unnecessary front-panel case cables (Reset SW, LEDs) to rule out a 5V short to the chassis. Still crashed.

It is not outdated Firmware: I updated the BIOS.

I have aggressively tested the RAM: I have cleared the CMOS (battery removed for 5+ mins), tested the RAM with EXPO on, EXPO off, and even tried booting and running with just a single stick in the A2 slot. No memory BSODs or error messages.

The AM5 Memory Training Loop: Half the time, after it hard-crashes, it gets stuck on the red and yellow motherboard debug lights and refuses to post until I clear the CMOS again.

My Questions for the Experts:

At this point, since the PSU and external power are ruled out, am I looking at a defective memory controller on the 9700X, or a physically defective MSI motherboard? By the way I've tried 2 different brand new MSI motherboards, still the same.

How do I definitively test whether it's the CPU or the Motherboard causing the total power loss without just blindly buying replacement parts? I've done OCCT stress tests showing that my temps are normal. I've also tried different GPUs, still the same.

I can no longer RMA for replacement.

Any help or theories would be massively appreciated. I just want to use my PC!