No, turning off the power supply unit does not harm your computer. It simply stops providing electricity to the system.
No, turning off the power supply unit does not harm your computer. It simply stops providing electricity to the system.
For reference, my motherboard has RGB lighting that I haven’t turned off in years. I’d always power down the PSU before bed and restart it after work. Over the years, I’ve set up three computers using the same routine. Does this affect my system at all? I just disabled AURA RGB in BIOS and now the machine stays on overnight. Am I being overly cautious? Just a note: I always power down before shutting off the PSU completely.
It doesn't damage the PC, though it adds extra stress to the PSU power switch.
This switch is being subjected to minimal stress, likely within its intended operational range.
Turning off the PSU causes the BIOS clock and CMOS settings to depend solely on the CMOS battery for retaining configurations. While the PC is powered down, a small current continues to flow to preserve CMOS settings and other motherboard functions, such as Wake on LAN if active.
It's not ideal to drain the battery too quickly, and it can cause the power supply unit and other components to face high power during spikes. This is similar to how you shouldn't turn off a TV with standby mode enabled—it won’t last as long when you stress the parts unnecessarily. Just switch it off completely when you’re away, like a vacation.
You should unplug the PC to shut it down completely. The RGB on your GPU remains active until you power off the power supply unit, at which point you’ll notice the light gradually fading.
After restoring power, pause for roughly a minute after flipping the PSU switch before starting the PC. This allows the current to stabilize in the circuit, preventing a sudden surge of voltage (though modern PSUs are likely capable, some capacitors might be affected).