PSU 1/0 switch

dougland · 11-04-2007, 04:30 AM

My PSU has a on/off switch on the back. When i turn the computer off for the night, do i need to turn that switch on the PSU off? or can i leave it in the on position? Thanks

-Doug

[-0MEGA-] · 11-04-2007, 04:59 AM

No you dont need to, as long as your computer is shutdown it's fine.

dougland · 11-04-2007, 05:09 AM

Thanks.what is that switch for? i know it turns the power supply completely off but why does it need to be there?

**The_Other_One** · 11-04-2007, 05:54 AM

You know, honestly I'm not sure why the switch is there. Perhaps a failsafe way of killing the power. Or an easy way to be sure the mobo's completely dead (as it still gets a little power regardless if the machine's on or not...) Not every PSU has the switch. I'm thinking my previous desktop didn't have one...

[-0MEGA-] · 11-04-2007, 02:28 PM

Quote:

Originally Posted by dougland

Thanks.what is that switch for? i know it turns the power supply completely off but why does it need to be there?

It's so you can completely shut off the power, because when the computer is shutdown using the power switch on the case or from within Windows, there is still power going to the motherboard. So if you needed to do some work on the motherboard or reset the BIOS by removing the CMOS jumper/battery, you would need to switch it off from the back.

11-04-2007, 04:30 AM	#1 (permalink)
dougland Gold Member Join Date: Sep 2007 Posts: 388	PSU 1/0 switch My PSU has a on/off switch on the back. When i turn the computer off for the night, do i need to turn that switch on the PSU off? or can i leave it in the on position? Thanks -Doug

11-04-2007, 04:59 AM	#2 (permalink)
[-0MEGA-] VIP Member Join Date: Nov 2004 Location: Concord, NH Age: 20 Posts: 27,382	No you dont need to, as long as your computer is shutdown it's fine. __________________ Core 2 Quad Q9550 @ 4.1GHz Asus Rampage Formula X48 ATI 4870X2 2GB GDDR5 (800/1900) 4GB (2x 2GB) DDR2 960 (6-6-6-18) 750GB SATAII w/32MB Creative SB X-Fi Titanium Fatal1ty SilverStone 750W +12V@60A 3DMark06: 22605

11-04-2007, 05:54 AM	#4 (permalink)
The_Other_One Super Moderator Join Date: Mar 2005 Location: Lexington, NC Age: 24 Posts: 12,368	You know, honestly I'm not sure why the switch is there. Perhaps a failsafe way of killing the power. Or an easy way to be sure the mobo's completely dead (as it still gets a little power regardless if the machine's on or not...) Not every PSU has the switch. I'm thinking my previous desktop didn't have one... __________________ Desktop * Athlon X2 4200 \| 2G RAM \| 160G HD \| 7600GT Laptop1 * C2D T5550 \| 3G RAM \| 120G HD \| Intel x3100 Laptop2 * C2D T5250 \| 2G RAM \| 160G HD \| Intel x3100

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11-04-2007, 05:09 AM	#3 (permalink)
dougland Gold Member Join Date: Sep 2007 Posts: 388	Thanks.what is that switch for? i know it turns the power supply completely off but why does it need to be there?