Flipping the PSU switch off at the back, safe or unsafe?
So, making the long story short whenever i shut down my system, i also flip the PSU switch at the back off too. when i told someone this they said i should i just do with regular shutdown and NOT flip the PSU switch off if i want my system to have a longer life. but i believe that if the PSU switched is flipped off from the back i am saving my system from a potential power surge when the system is off.
Corsair Obsidian 900D
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Intel i9 - 9900k
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G.Skill Trident Z RGB 32GB 3200Mhz
Well, if you shut it down normally, and then flip the switch off, there is nothing wrong with that.
Usually, the PSUs (the GOOD quality ones), have anti-surge protection (although, you will need to change the breaker on it), so even if there is a power surge, it should hit only the PSU (if the system is off at least).
If the motherboard is of a good quality, you should not have any issue with the system durability. If it has cheap capacitors, they may end up degrading faster. But they usually die due to high temperatures and age. And maybe the motherboard battery may run out in a few years, but they are like 1$.
When the back switch is turned on, the auxiliary PSU is running, and it creates the standby power, that is wired to the mobo board switch. So it's similar to leaving a 12V wallpack plugged in.
So not only is it MUCH MUCH safer to turn off the rear switch, if you're going on holiday, it saves power too. In fact if I leave my PC for a few days, I unplug it all together, just in-case there's a lightning strike or something.