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Does a PC draw any power when it's totally off?

post #1 of 4
Thread Starter 
It uses like one or two watts just for the power button to function I think, anything else?
post #2 of 4
The +5VSB rail of the power supply will be powering the CMOS circuitry (what stores BIOS settings, and initiates POST) and any USB and PS/2 devices that are plugged in (unless those are set to use the regular +5V).

Even when the PSU is turned off at the switch, the PSU still draws a tiny fraction of a watt for its own startup circuitry.
post #3 of 4
Quote:
Originally Posted by TrueOptic View Post
It uses like one or two watts just for the power button to function I think, anything else?
well there is the battery on the mobo. and maybe some mobo leds.
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CPUMotherboardGraphicsRAM
Core i5-750 @ 4Ghz Gigabyte P55A-UD4P MSI GTX 770 Kingston HyperX 2x4GB 1600MHz CL9 
Hard DriveOptical DriveCoolingOS
WD Caviar Black 500GB LG 24x Corsair H50 Windows 7 Ultimate x64 
MonitorKeyboardPowerCase
Samsung SyncMaster P2270 Steelseries 6Gv2 Corsair TX750 Thermaltake V9 Black Edition 
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Razer Deathadder 2013 Edition Steelseries QcK 
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Reply
post #4 of 4
Very miniscule power consumption
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CPUMotherboardGraphicsRAM
|i5 750-voltage may vary| |Foxconn Katana[Non GTI]| 380 4Gb |4Gb/Tridents@Clocked| 
Hard DriveOSMonitorPower
|[V3/60Gb][500Gb]| |Windows 7 64 bit| |LG-EW224| |Antec HCG750| 
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|Tech Station| 
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EVOLVE
(13 items)
 
  
CPUMotherboardGraphicsRAM
|i5 750-voltage may vary| |Foxconn Katana[Non GTI]| 380 4Gb |4Gb/Tridents@Clocked| 
Hard DriveOSMonitorPower
|[V3/60Gb][500Gb]| |Windows 7 64 bit| |LG-EW224| |Antec HCG750| 
Case
|Tech Station| 
  hide details  
Reply
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