New 4090 model designed to shut down unpredictably at random times, even once the power supply is changed.
New 4090 model designed to shut down unpredictably at random times, even once the power supply is changed.
Specs: PNY 4090 7700X B650 Aorus Pro G.Skill Flare X5 Series (AMD Expo) 32GB MSI MPG A1000G PCIE 5.0 1000W (ATX 3.0) SAMSUNG 980 PRO Corsair iCUE H150i Lian Li UNI FAN SL120 (x6) 64-bit Windows 11 Professional (10.0.22621) Issues: System shuts down unexpectedly without any link to current tasks. Struggled for over a month after BIOS update and CMOS reset; recently it has become increasingly unstable. I’ve managed to run it stably for more than 12 hours under heavy load for several days, but now it often powers off after just 15 minutes of inactivity. Yesterday I swapped the power supply entirely—replaced the 600W cable, updated the outlet—and still faced the same problem. Testing with one RAM stick at a time in both single-channel slots didn’t resolve the issue. Solutions tried: updated BIOS, applied all Windows updates, refreshed NVIDIA drivers, toggled EXPO settings, verified connections, ran memory diagnostics, checked Event Viewer and reliability logs, executed DISM commands. No faults found. Possible fixes: install a bigger UPS, replace the motherboard, swap the M.2 drive, or reinstall Windows 11 after cleaning up. I’m trying to stay logical and avoid random changes, but I want to be thorough. If anything obvious is missing, please note it so I can address it first. Also, if you notice any signs of failure in other parts before swapping components, let me know—I’d appreciate that guidance. Thanks for your support.
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Set up an account to respond. I faced a comparable situation on my home server recently. It lasted many months with troubleshooting and frequent crashes—sometimes weekly. Eventually, I noticed the USB 3.0 controller was disabled in Device Manager. The external hard drive disappeared, leading me to replace the motherboard. While removing the old one, I found a bent USB 3.0 header pin that could cause intermittent shorts. Though unusual, it might be worth disassembling everything thoroughly before assuming a failed motherboard. A loose connector or bent tray piece could also be causing issues. Best of luck!
Thanks for your responses. I've since: Rearranged the GPU setup—tested with all six case fans off, then with three AIO radiator fans also disconnected (hoping a faulty fan caused a short). Next step is to fully take apart the unit and rebuild it. Important points: The issues I'm facing are worsening over time. Crash frequency has increased from weekly to about every hour, and now it's around 5 minutes after booting and logging in. This suggests a hardware failure rather than just a temporary issue like voltage spikes or short circuits. Additionally, I'm experiencing frequent full system freezes, especially when the PC runs longer than five minutes. At first I thought these were minor problems, but now I suspect they might be linked to the M.2 SSD.