techPowerUp! Forums

Go Back   techPowerUp! Forums > Hardware > General Hardware

Reply
 
Thread Tools
Old Oct 19, 2012, 11:44 AM   #1
Black Panther
Senior Moderator™
 
Black Panther's Avatar
 
Join Date: May 2007
Posts: 7,063 (3.23/day)
Thanks: 2,170
Thanked 1,842 Times in 1,105 Posts

System Specs

My USB's have power when the computer's turned off?!

Yesterday I attached a small USB fibre-optic ornament to the pc (White Bengal in system specs). I turned the pc off but didn't switch everything off from the wall-socket. The ornament remained lit. At first I thought it was extra charge in the PSU but not after an hour and more?

This morning, I noticed the ornament lit up as soon as I switch on power from the wall socket. Even though pc is not powered and not running.

I checked the same thing out on my previous pc (Black Panther in system specs) and the USB doesn't have current in it when the pc is off.

Is there something wrong?
Black Panther is offline  
Reply With Quote
Old Oct 19, 2012, 11:46 AM   #2
btarunr
Editor & Senior Moderator
 
btarunr's Avatar
 
Join Date: Oct 2007
Location: Hyderabad, India
Posts: 14,984 (7.29/day)
Thanks: 788
Thanked 12,911 Times in 5,655 Posts
Send a message via AIM to btarunr Send a message via MSN to btarunr

System Specs

Your motherboard doesn't deep-sleep. Go to the BIOS setup program, and under the power-management settings, look for "ErP Compliance" mode or "Deep S5 mode", enable it.

__________________

Gadgets, Phones, Tablets, Cameras, TVs, HiFi...NextPowerUp
btarunr is offline  
Reply With Quote
The Following User Says Thank You to btarunr For This Useful Post:
Old Oct 19, 2012, 02:36 PM   #3
Black Panther
Senior Moderator™
 
Black Panther's Avatar
 
Join Date: May 2007
Posts: 7,063 (3.23/day)
Thanks: 2,170
Thanked 1,842 Times in 1,105 Posts

System Specs

Never heard about that I thought I had messed up something when I built the pc..

Now that I know that there isn't anything shorting out, I'll leave it as it is because I actually like having the decoration light up even while the pc is turned off.

I still can't figure out how this works electronically...

It means that the PSU is still receiving and sending current from wall-socket to the motherboard and USB's even though the PSU is in the 'off' position?
Black Panther is offline  
Reply With Quote
Old Oct 19, 2012, 02:41 PM   #4
Derek12
500 Posts
 
Join Date: Jan 2010
Posts: 925 (0.75/day)
Thanks: 480
Thanked 142 Times in 134 Posts

System Specs

PSUs have a +5V Standby rail which is always on even if computer is off, and most modern mobos use it for powering up USB devices
Derek12 is offline  
Reply With Quote
The Following User Says Thank You to Derek12 For This Useful Post:
Old Oct 19, 2012, 02:43 PM   #5
Black Panther
Senior Moderator™
 
Black Panther's Avatar
 
Join Date: May 2007
Posts: 7,063 (3.23/day)
Thanks: 2,170
Thanked 1,842 Times in 1,105 Posts

System Specs

Great info! Thanks everybody
Black Panther is offline  
Reply With Quote
Old Oct 19, 2012, 04:45 PM   #6
entropy13
2000 Posts
 
entropy13's Avatar
 
Join Date: Mar 2009
Location: Philippines
Posts: 3,425 (2.22/day)
Thanks: 42
Thanked 1,133 Times in 714 Posts

System Specs

And your PSU has a 3A +5VSB rail, most likely more than enough for your decorative light.
__________________
MSI P67A-GD65 (B3), Intel Core i5 2500K, Corsair H60, 2x MSI GTX 570 Twin Frozr II/OC, G.Skill RipjawsX (2x4GB) DDR3-1600 RAM, OCZ Agility 3 120GB + 2TB, Corsair AX1200, Corsair Carbide 400R

MSI Z68MA-ED55, i5 2500K, Noctua NH-U9B SE2, Inno3D GTX 570, Corsair Vengeance LP 8GB, OCZ Agility 3 120GB + 1TB, Seasonic X660, Lian Li PC-V600FB

The Big Useful List of Free Useful Programs To Use Usually For Free
entropy13 is offline  
Reply With Quote
Old Oct 19, 2012, 04:47 PM   #7
brandonwh64
Addicted to Bacon and StarCrunches!!!
 
brandonwh64's Avatar
 
Join Date: Sep 2009
Location: Chatsworth, GA
Posts: 13,571 (10.00/day)
Thanks: 2,149
Thanked 5,342 Times in 3,697 Posts
Send a message via ICQ to brandonwh64 Send a message via AIM to brandonwh64 Send a message via MSN to brandonwh64 Send a message via Yahoo to brandonwh64

System Specs

Its cool cause you can charge your phone or tablet while you sleep
__________________
Cruncher's:
All GPU's
GPU's:
7970 3GB *Unlocked* = 8 Threads
5770 1GB OCed = 2 Threads
brandonwh64 is online now  
Crunching for Team TPU
Reply With Quote
Old Oct 19, 2012, 05:10 PM   #8
Wrigleyvillain
3500 Posts
 
Wrigleyvillain's Avatar
 
Join Date: Oct 2007
Location: Chicago
Posts: 4,507 (2.20/day)
Thanks: 1,528
Thanked 1,579 Times in 1,122 Posts

System Specs

Yeah I have a strip of white LED lights power by USB under my monitor panel and it stays on unless I flip the switch on the PSU.
__________________
“i dont care what consoles have they dont have mouse and keyboard” -crazyeyesreaper
Wrigleyvillain is offline  
Reply With Quote
Old Oct 19, 2012, 06:20 PM   #9
de.das.dude
3500 Posts
 
de.das.dude's Avatar
 
Join Date: Jun 2010
Location: Wild Wild East
Posts: 4,604 (4.27/day)
Thanks: 2,339
Thanked 1,344 Times in 921 Posts
Send a message via Skype™ to de.das.dude

System Specs

Quote:
Originally Posted by Derek12 View Post
PSUs have a +5V Standby rail which is always on even if computer is off, and most modern mobos use it for powering up USB devices
^ this.

this is actually present to support USB charging feature of many devices like tablets and phones and mp3 players and stuff.
__________________
my wallet isnt hashwell compatiple *sad face*
de.das.dude is online now  
Reply With Quote
Old Oct 19, 2012, 08:48 PM   #10
hat
Maximum Overclocker
 
hat's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 12,236 (5.15/day)
Thanks: 2,054
Thanked 2,039 Times in 1,549 Posts

System Specs

Yup, that's what it's for. Nothing's wrong, it's actually a feature.
__________________
My Heatware
“Inb4 smartphone LN2 overclocking.” -radrok
hat is offline  
Crunching for Team TPU
Reply With Quote
Old Oct 19, 2012, 10:05 PM   #11
Krazy Owl
Banned
 
Join Date: Jan 2012
Location: Montreal
Posts: 889 (1.78/day)
Thanks: 122
Thanked 77 Times in 54 Posts

System Specs

I have that on my backup rig Socket 754 AMD. It's a good feature but imho it's more prone to blow the system if there is a lighting strike. I'm not an expert so it's only a guess.
Krazy Owl is offline  
Reply With Quote
Old Oct 19, 2012, 10:22 PM   #12
Jstn7477
2000 Posts
 
Jstn7477's Avatar
 
Join Date: Aug 2009
Location: Sarasota, Florida, USA
Posts: 3,143 (2.30/day)
Thanks: 389
Thanked 1,194 Times in 806 Posts

System Specs

All ATX systems for the last 15 years require the 5VSB rail for other reasons (Wake on LAN, Wake on KB, etc.) and motherboard manufacturers began allowing USB ports to use that rail instead of only the onboard LAN adapter and PS/2 ports. We weren't really connecting our mobile devices to our PCs until the mid 2000s when feature phones and eventually smart phones with USB connections became prominent.
__________________
Intel Crunchers (27 threads): 2x 3770K 4.3G (14t), 2600K 4G (7t), X3210 (3t), P-M 735A, P4 HT 3G
AMD Crunchers (11 cores):1100T 3.6G (3t), 1045T 3.4G (2t), X3 8550 2.5G, X2 4200+, T64 ML-37
AMD Folders (6272 GCN cores): 2x 7950 1125/1475, 7970 1150/1650, 7770 1100/1200
NV Folders (2336 GF10x + 1344 GK104 cores):GTX 470 & 465 720/1715, 4x 460 768MB 825/2000, GTS 450, 660Ti 1228/6000

HEATWARE
Jstn7477 is offline  
Crunching for Team TPU More than 25k PPD
Reply With Quote
The Following User Says Thank You to Jstn7477 For This Useful Post:
Old Oct 20, 2012, 03:52 AM   #13
de.das.dude
3500 Posts
 
de.das.dude's Avatar
 
Join Date: Jun 2010
Location: Wild Wild East
Posts: 4,604 (4.27/day)
Thanks: 2,339
Thanked 1,344 Times in 921 Posts
Send a message via Skype™ to de.das.dude

System Specs

Quote:
Originally Posted by Krazy Owl View Post
I have that on my backup rig Socket 754 AMD. It's a good feature but imho it's more prone to blow the system if there is a lighting strike. I'm not an expert so it's only a guess.
i think all PSUs have lightning protection now.
__________________
my wallet isnt hashwell compatiple *sad face*
de.das.dude is online now  
Reply With Quote
Old Oct 20, 2012, 09:07 AM   #14
Aquinus
3500 Posts
 
Aquinus's Avatar
 
Join Date: Jan 2012
Location: Dover, New Hampshire, USA
Posts: 4,276 (8.85/day)
Thanks: 1,284
Thanked 1,333 Times in 989 Posts

System Specs

I built my parents a rig some time ago with a 2600k and a Gigabyte P67-UD4-B3 and IIRC the board has a jumper to switch certain USB groups between +5vsb and +5v with +5vsb being the default.
__________________
MyHeat
Aquinus is offline  
Crunching for Team TPU
Reply With Quote
Old Oct 20, 2012, 11:18 AM   #15
Derek12
500 Posts
 
Join Date: Jan 2010
Posts: 925 (0.75/day)
Thanks: 480
Thanked 142 Times in 134 Posts

System Specs

Quote:
Originally Posted by de.das.dude View Post
i think all PSUs have lightning protection now.
In my case I use a power strip w/surge protection and switch, but I still unplug it when not in use for a long time i.e night, watching TV, etc.. I had bad experiences with thunderstorms and appliances...

Also it can save some money on bills especially if electricity is expensive like here
Derek12 is offline  
Reply With Quote
Old Oct 20, 2012, 11:27 AM   #16
Aquinus
3500 Posts
 
Aquinus's Avatar
 
Join Date: Jan 2012
Location: Dover, New Hampshire, USA
Posts: 4,276 (8.85/day)
Thanks: 1,284
Thanked 1,333 Times in 989 Posts

System Specs

Quote:
Originally Posted by Derek12 View Post
In my case I use a power strip w/surge protection and switch, but I still unplug it when not in use for a long time i.e night, watching TV, etc.. I had bad experiences with thunderstorms and appliances...

Also it can save some money on bills especially if electricity is expensive like here
I have pretty hefty surge protection on my UPS. Heck, if the power quality gets too low it switches to the battery. One of the best investments I've made.
__________________
MyHeat
Aquinus is offline  
Crunching for Team TPU
Reply With Quote
Old Oct 20, 2012, 04:35 PM   #17
Derek12
500 Posts
 
Join Date: Jan 2010
Posts: 925 (0.75/day)
Thanks: 480
Thanked 142 Times in 134 Posts

System Specs

Quote:
Originally Posted by Aquinus View Post
I have pretty hefty surge protection on my UPS. Heck, if the power quality gets too low it switches to the battery. One of the best investments I've made.
Yeah I want a UPS too but here they are too expensive
Derek12 is offline  
Reply With Quote
Old Nov 1, 2012, 09:58 AM   #18
Urnighta
 
Join Date: Nov 2012
Posts: 1 (0.00/day)
Thanks: 0
Thanked 0 Times in 0 Posts

Quote:
Originally Posted by Black Panther View Post
Yesterday I attached a small USB fibre-optic ornament to the pc (White Bengal in system specs). I turned the pc off but didn't switch everything off from the wall-socket. The ornament remained lit. At first I thought it was extra charge in the PSU but not after an hour and more?

This morning, I noticed the ornament lit up as soon as I switch on power from the wall socket. Even though pc is not powered and not running.
clicking here

I checked the same thing out on my previous pc (Black Panther in system specs) and the USB doesn't have current in it when the pc is off.

Is there something wrong?
There might be some issue in your mother board

Last edited by Urnighta; Nov 2, 2012 at 06:17 AM.
Urnighta is offline  
Reply With Quote
Old Nov 1, 2012, 10:02 AM   #19
Aquinus
3500 Posts
 
Aquinus's Avatar
 
Join Date: Jan 2012
Location: Dover, New Hampshire, USA
Posts: 4,276 (8.85/day)
Thanks: 1,284
Thanked 1,333 Times in 989 Posts

System Specs

Quote:
Originally Posted by Urnighta View Post
There might be some issue in your mother board
Or maybe his motherboard is using +5vsb like the specs on Gigabyte's site says.
__________________
MyHeat
Aquinus is offline  
Crunching for Team TPU
Reply With Quote
Old Nov 1, 2012, 11:28 AM   #20
Mussels
Doctor Moderator
 
Mussels's Avatar
 
Join Date: Oct 2004
Location: Bendigo, Australia (NOT THE USA)
Posts: 34,561 (10.96/day)
Thanks: 3,700
Thanked 8,697 Times in 6,394 Posts

System Specs

i know i'm going to have issues with this in my next build, simply because i have a backlit keyboard.


one of those weird 'features' that not everybody wants.
Mussels is offline  
Reply With Quote
Old Nov 1, 2012, 11:56 AM   #21
Aquinus
3500 Posts
 
Aquinus's Avatar
 
Join Date: Jan 2012
Location: Dover, New Hampshire, USA
Posts: 4,276 (8.85/day)
Thanks: 1,284
Thanked 1,333 Times in 989 Posts

System Specs

Quote:
Originally Posted by Mussels View Post
i know i'm going to have issues with this in my next build, simply because i have a backlit keyboard.


one of those weird 'features' that not everybody wants.
I thought that there is a jumper on the motherboard to switch it on and off for different USB ports. At least I think that was the deal with the P67A-UD4-B3.

Edit: Hmmm, manual is lacking information. That is strange. I would imagine that you would be able to change it though. Forcing it on sounds incredibly stupid.

Edit again: Wow, gigabyte says this in their manual.
Quote:
Originally Posted by Gigabyte
Q: Why is the light of my keyboard/optical mouse still on after the computer shuts down?
A: Some motherboards provide a small amount of standby power after the computer shuts down and that's why the light is still on.
__________________
MyHeat

Last edited by Aquinus; Nov 1, 2012 at 12:12 PM.
Aquinus is offline  
Crunching for Team TPU
Reply With Quote
Old Nov 1, 2012, 12:06 PM   #22
Mussels
Doctor Moderator
 
Mussels's Avatar
 
Join Date: Oct 2004
Location: Bendigo, Australia (NOT THE USA)
Posts: 34,561 (10.96/day)
Thanks: 3,700
Thanked 8,697 Times in 6,394 Posts

System Specs

Quote:
Originally Posted by Aquinus View Post
I thought that there is a jumper on the motherboard to switch it on and off for different USB ports. At least I think that was the deal with the P67A-UD4-B3.

Edit: Hmmm, manual is lacking information. That is strange. I would imagine that you would be able to change it though. Forcing it on sounds incredibly stupid.
from the amount of threads on this subject lately, i'm going to say not all boards have it. mine has it only on specific ports, which is a good compromise.
Mussels is offline  
Reply With Quote
Old Nov 1, 2012, 08:55 PM   #23
Derek12
500 Posts
 
Join Date: Jan 2010
Posts: 925 (0.75/day)
Thanks: 480
Thanked 142 Times in 134 Posts

System Specs

Quote:
Originally Posted by Urnighta View Post
There might be some issue in your mother board
No, it's fine.
Derek12 is offline  
Reply With Quote
Old Nov 1, 2012, 09:28 PM   #24
de.das.dude
3500 Posts
 
de.das.dude's Avatar
 
Join Date: Jun 2010
Location: Wild Wild East
Posts: 4,604 (4.27/day)
Thanks: 2,339
Thanked 1,344 Times in 921 Posts
Send a message via Skype™ to de.das.dude

System Specs

Quote:
Originally Posted by Derek12 View Post
In my case I use a power strip w/surge protection and switch, but I still unplug it when not in use for a long time i.e night, watching TV, etc.. I had bad experiences with thunderstorms and appliances...

Also it can save some money on bills especially if electricity is expensive like here
lightning has a better chance to get through the ethernet cable. ofcourse this is true for people with underground power cabling. I have had a vblown lan card once. lol. rest of the system was ok
__________________
my wallet isnt hashwell compatiple *sad face*
de.das.dude is online now  
Reply With Quote
The Following User Says Thank You to de.das.dude For This Useful Post:
Old Nov 1, 2012, 09:51 PM   #25
Wrigleyvillain
3500 Posts
 
Wrigleyvillain's Avatar
 
Join Date: Oct 2007
Location: Chicago
Posts: 4,507 (2.20/day)
Thanks: 1,528
Thanked 1,579 Times in 1,122 Posts

System Specs

Yeah. And I only just recently learned this.
__________________
“i dont care what consoles have they dont have mouse and keyboard” -crazyeyesreaper
Wrigleyvillain is offline  
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Does the PSU power switch completely cut off the power? Tommygunn General Hardware 3 Nov 21, 2011 04:52 PM
Team Fortress 2 - Crashes when AA is turned on. Rock God Games 2 Apr 4, 2009 11:22 PM
Silicon Power Releases eSATA/USB SSD Featuring 8x the Write Speed of the Normal USB btarunr News 14 Dec 6, 2008 12:33 PM
My Computer just turned itself off... o_0 WhiteLotus General Hardware 77 Apr 15, 2008 11:54 AM
Laptop Clock Doesn't Tick When Power is Off muka3d Motherboards & Memory 1 Apr 13, 2008 05:58 PM


All times are GMT. The time now is 07:07 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd.
no new posts