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Does my PSU get damaged if it suddenly loses power?

post #1 of 7
Thread Starter 
Say in 1) the event of a power outage or, 2) if I suddenly flick the psu switch on the back off while idling on the desktop? I've always been wondering about this, and isn't it electrically safe? I mean, you're merely cutting power to the psu, and not overloading it. Yes, I do get lazy to have to go through the shutdown cycle sometimes and just flick the psu switch off. redface.gif (this was on my old POS rig tho)
Edited by Spade616 - 3/24/14 at 1:51am
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Medschool Rig
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post #2 of 7
While not harmful to your PSU, this is extremely harmful to your hard disks, and can cause data loss, corruption, and premature failure on other moving parts or media objects.
post #3 of 7

Yeah I wouldn't worry about your PSU, its designed to handle some punishment, and that doesn't class as punishment by any stretch of the imagination.

 

Your hard drives won't like it though.

The Stormtrooper
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The Stormtrooper
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post #4 of 7
Thread Starter 
Thanks, Im actually not too worried about the drives, since they're old and contain non-essential data. Ill be upgrading them soon tho, so obviously ill avoid shutting it down via said method. Im just worried about the new PSU, since on my old HX650, there was a crackling and popping sound when i flipped the PSU switch ON, and there was a spark, and it died. I was thinking maybe 3 years of shutting the system down via the psu switch effed it up. T_T
Edited by Spade616 - 3/24/14 at 2:14am
Medschool Rig
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Intel Core i5 2500K @ 4.3GHz, stock volts Gigabyte Z77M-D3H rev1.1 Sapphire R9 290X Tri-X OC 4GB 8GB (2x4GB) G.Skill Ripjaws X DDR3 1600MHz CL9 
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WD 320GB Blue, 640GB Black, 2TB Green LG Lightscribe Cooler Master Hyper 212X Windows 7 Ultimate x64 
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Logitech G502 Proteus Core Dragon War Friction Extended size 
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Medschool Rig
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CPUMotherboardGraphicsRAM
Intel Core i5 2500K @ 4.3GHz, stock volts Gigabyte Z77M-D3H rev1.1 Sapphire R9 290X Tri-X OC 4GB 8GB (2x4GB) G.Skill Ripjaws X DDR3 1600MHz CL9 
Hard DriveOptical DriveCoolingOS
WD 320GB Blue, 640GB Black, 2TB Green LG Lightscribe Cooler Master Hyper 212X Windows 7 Ultimate x64 
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Samsung 2233sw 22" 1080p Razer Blackwidow Tournament Edition orange switch Seasonic X460 Gold Antec 300 
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Logitech G502 Proteus Core Dragon War Friction Extended size 
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post #5 of 7
Would it be feasible to set the power switch for sleep and just push the power button when you're done ?
Sleep mode is just as energy efficient and safe as completely off, with the added exception you can resume quicker then the boot-up process.
Trying to wrap my head around why you just flip the switch, for speed of shutdown ?
post #6 of 7
Thread Starter 
Quote:
Originally Posted by Arakasi View Post

Would it be feasible to set the power switch for sleep and just push the power button when you're done ?
Sleep mode is just as energy efficient and safe as completely off, with the added exception you can resume quicker then the boot-up process.
Trying to wrap my head around why you just flip the switch, for speed of shutdown ?

yeah pretty much, im on call at the hospital so more often than not, i really cant be bothered going through the whole shutdown process lol. but i guess i have to change my shutdown habits redface.gif
Medschool Rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500K @ 4.3GHz, stock volts Gigabyte Z77M-D3H rev1.1 Sapphire R9 290X Tri-X OC 4GB 8GB (2x4GB) G.Skill Ripjaws X DDR3 1600MHz CL9 
Hard DriveOptical DriveCoolingOS
WD 320GB Blue, 640GB Black, 2TB Green LG Lightscribe Cooler Master Hyper 212X Windows 7 Ultimate x64 
MonitorKeyboardPowerCase
Samsung 2233sw 22" 1080p Razer Blackwidow Tournament Edition orange switch Seasonic X460 Gold Antec 300 
MouseMouse Pad
Logitech G502 Proteus Core Dragon War Friction Extended size 
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Reply
Medschool Rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500K @ 4.3GHz, stock volts Gigabyte Z77M-D3H rev1.1 Sapphire R9 290X Tri-X OC 4GB 8GB (2x4GB) G.Skill Ripjaws X DDR3 1600MHz CL9 
Hard DriveOptical DriveCoolingOS
WD 320GB Blue, 640GB Black, 2TB Green LG Lightscribe Cooler Master Hyper 212X Windows 7 Ultimate x64 
MonitorKeyboardPowerCase
Samsung 2233sw 22" 1080p Razer Blackwidow Tournament Edition orange switch Seasonic X460 Gold Antec 300 
MouseMouse Pad
Logitech G502 Proteus Core Dragon War Friction Extended size 
  hide details  
Reply
post #7 of 7
I don't know how the user can turn off a PSU gradually. biggrin.gif

PSUs contain circuitry to limit the turn-on jolts. One way is with a thermistor wired into the AC line. At first it's resistance is high because it's cold, so current and voltage are limited, but as it heats up, the resistance goes down to zilch, and full voltage is applied. The other way is with a "soft start" timing capacitor to make the PSU controller chip gradually bring up the duty cycle of the power oscillator, which gradually brings up the output voltages. Still, you probably don't want to turn the PSU on and off rapidly, without waiting a second each time.
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