Head-high performance drops when stress increases — software freezes during intensive tasks (i9-14900K / Z790)
Head-high performance drops when stress increases — software freezes during intensive tasks (i9-14900K / Z790)
I’m dealing with significant system instability that occurs when my PC is running under moderate to high demand. This issue impacts several applications at once, not just a single program, which leads me to believe there may be a hardware-related problem.
Symptoms
Games frequently crash:
Valorant
crashes while showing Riot crash report window
Palworld
generates EXCEPTION_ACCESS_VIOLATION errors
Forza Horizon 4
occasionally fails to launch or stops abruptly
Browsers shut down with
STATUS_BREAKPOINT
error
USB peripherals (mouse/keyboard) may disconnect under heavy usage
Instability intensifies during gaming + streaming (OBS)
Performance remains acceptable at idle or light tasks
This pattern suggests memory or CPU instability triggered by load.
System Specs
CPU: Intel Core i9-14900K
Motherboard: MSI PRO Z790-P WIFI
GPU: GeForce RTX 4070 Ti
RAM: 32GB (2×16GB) Corsair Vengeance DDR5
SSD: WD Black SN770 2TB
PSU: MSI A1000GL PCIE5
Cooler: MSI MEG CoreLiquid S360
What I’ve tried
Performed a clean Windows reinstall
Updated BIOS
Disabled XMP
Enabled Multicore Enhancement / Enhanced Turbo
Tested various USB ports
Reinstalled GPU drivers
No manual overclocking applied
Observations
Instability mainly appears when CPU/GPU workload rises
Impacts different software types (games, browsers, system devices)
This leads me to suspect:
CPU instability
RAM instability
BIOS power/voltage behavior
Motherboard-related issues
Questions
Have others experienced comparable problems on 13th/14th generation Intel + Z790 systems? If so, what stability tests or BIOS configurations should I examine next to differentiate between CPU, RAM, and motherboard causes?
Check Reliability History/Monitor and Event Viewer for error codes, warnings, and informational events recorded just before or during crashes. Begin with the Reliability History; it offers a more user-friendly interface and a graphical timeline that can show trends. Event Viewer demands more time and effort to explore but allows precise searches. For assistance, refer to the provided link. Both tools let you click entries for more details, though their usefulness may vary. Also review Update History for any failed or problematic updates beforehand. Consider running "dism" and "sfc /scannow" to help identify and repair corrupted files.
You’ve reviewed Reliability Monitor and Event Viewer as advised. The data indicates repeated crashes in several unrelated programs—browsers, games, MSI services, and even basic Windows functions—suggesting a broader issue beyond a single application. In Event Viewer, you notice kernel events like Power On and BugCheck alerts, plus service termination logs, but no WHEA-Logger errors. The pattern shows normal operation under light use, but instability appears during heavy tasks such as gaming or streaming. With a clean reinstall of Windows, updated drivers, no overclocking, XMP disabled, and a recent BIOS update, the problem likely stems from CPU or RAM issues rather than software faults. Consider checking hardware components instead of the motherboard or power supply.
To resolve ram problems, execute memtest86.
It does not require windows.
If it completes the full test without errors, you should be fine.
For extra confidence, repeat the process a few more times.
Ensuring your BIOS is up to date is crucial.
These updates handle voltage concerns and safeguard your processor from harm.
Changing errors and rising numbers signal a weakening or failing PSU. Such issues can ruin files, worsening the situation. Always back up crucial data at least twice, storing it in separate locations away from the main system. Make sure these backups are accessible and readable.
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Check for physical issues: power down, disconnect, open the case. Remove dust and debris. Confirm all connectors, cards, RAM, jumpers, and case parts are securely placed. Examine with a bright flashlight for damage signs—exposed conductors, bent wires, melting, corrosion, discoloration, loose screws, scratches, sagging brackets, swollen components.
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Replace the PSU with a known working unit to see if stability improves.
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If swapping isn’t feasible, use a multimeter to test voltages. This isn’t a complete load test, but any readings outside tolerance suggest the PSU is likely responsible.
This functionality isn't active when the BIOS is enabled automatically, likewise for XMP; the MMO will still auto overclock. Verify with HWmonitor in Windows regarding the CPU's power consumption and clock speeds, and confirm that XMP settings don't surpass your RAM specifications.
I spent around thirty-five years in the computer design, build, and repair sector, but it’s been a while since I was actively involved. Nowadays, I mainly work on diagnosing family members’ systems and my own machines.
Turn off the power supply, keep the power cord connected to the PSU for grounding, press and hold the power button on for six seconds. Remove and swap out the RAM.
Access BIOS and disable any overclocked features (RAM will revert to its minimum speed), as this is likely the main issue. The problem may stem from PSU or other hardware failures.
You didn’t specify the type of TIM used under the CPU or its age. Some TIMs degrade each year, sometimes turning into powder and causing overheating. I recommend using Noctua NT-H2—it lasts about five years and has a three-year container life. For longer storage, follow these steps: place it back in the original box with the end facing down, allowing gravity to draw excess liquid out. If needed, use a thick scrap piece of paper to push any remaining liquid until the TIM is clean before reinserting.
Note: This method works best with NT-H2.