System shuts off unexpectedly.
System shuts off unexpectedly.
Hello, I hope someone can offer some insights on what’s going on with my new PC setup. I recently assembled a system featuring an AMD 7800X3D, an ASUS LC 4090, and a 1000W Corsair HX power supply. I haven’t pushed it into overclocking, and performance is solid—temperatures stay around 60°C on the GPU, CPU stays between 40-50°C during Alan Wake 2 at full resolution. My VMware Workstation is running a single virtual machine for work, with no strain beyond Office and web use.
The oddity began when I was watching Rick and Morty and both screens went to sleep, thinking Windows would shut down. I tried pressing keys or clicking the mouse but didn’t reactivate. All fans and the LCD remained lit, so I force-closed the system and everything functioned again. I checked that sleep was turned off for both my gaming PC and VMware guest, and disabled the hard drive shutdown option. After a 20-minute break, the issue returned—PC unresponsive. I connected another USB keyboard and even a disconnected headset, but nothing worked. All lights and fans stayed active.
I suspected a power issue since this setup is unusually power-hungry, and 1000W might be insufficient. I used HWinfo and Furmark to monitor voltage; the system stayed stable with total power around 500W. I ran it for an hour without input and still didn’t see sleep. Windows Event Logs showed no activity when it did sleep, suggesting something was interfering.
I enabled XMP profiles on RAM and tried it—sleep occurred in minutes, but I disabled the profile before restarting. No BSODs appeared, and all drivers were up to date. I purchased the components from Memory Express because of distance, mounting RAM, CPU, and M.2 SSD myself. During BIOS updates, I ran into some problems but eventually fixed them.
I checked for compatibility with VMware Workstation and AMD, finding no issues online. I updated the BIOS but still faced some hiccups. The only real clue was that my PC didn’t enter sleep when idle, and I couldn’t find any reports of problems with VMware or this specific build.
I’m at a loss, especially since this is my first AMD build in a long time. Could there be a hidden power setting or compatibility conflict? I’m curious about disabling the GPU on the AMD chip, though I don’t have time to test that right now. Thanks for any help!
Begin by checking if the newest BIOS is installed; if not, update it. Then within the BIOS settings, turn off energy-saving features. Restart, open Command Prompt with admin privileges, and execute the following commands: powercfg.exe /hibernate off; powercfg /x -standby-timeout-ac 0; powercfg /x -standby-timeout-dc 0. Reboot to confirm the issue resolves. Cheers Ang
Thanks for the update. I actually handled everything myself. I even believed I had caught something, so I put the computer to sleep on purpose and came back an hour later—it was fine. While browsing, my monitors shut down and the machine stopped working (the fans were still running, RGB stayed on). I tried to recreate it last night but couldn’t. These strange problems are the hardest to fix.