Go Down

Topic: RESOLVED What is "VSB" on a power supply? (Read 708 times) previous topic - next topic


Jan 06, 2013, 03:41 pm Last Edit: Jan 07, 2013, 06:04 pm by JimboZA Reason: 1
Hi gang,

The pic shows the label on a desktop pc power supply... I understand the DC outputs like 3.3, 5 (circled red) and 12V, but I've never noticed the +5VSB (circled purple) before.

Please can someone enlighten me as to what that is?


Gone for good


I believe the "+5V" part means the same as it does elsewhere.  The "SB" part probably stands for "Stand-By" which would mean a 5V supply that is on even when the rest of the power supply is off.  It's used to maintain memory or power the power switch.
Send Bitcoin tips to: 1L3CTDoTgrXNA5WyF77uWqt4gUdye9mezN
Send Litecoin tips to : LVtpaq6JgJAZwvnVq3ftVeHafWkcpmuR1e


Yep I got the +5V part too John  :)

But thanks, Stand By makes sense.

power the power switch.

Gotta love that idea.... sorry, can't switch the power on cos there's no power to power the switch.

Gone for good


Well its used for wake-on-LAN etc, not just the power switch.  Some machines have permanently powered USB sockets
too IIRC.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]


Confirmed from various Instructables like this one that the purple "SB" is indeed StandBy.
Gone for good

Go Up