i just bought a psu, corsair, . im getting strange symtoms on my computer..
 
even though the pcu is off, there is a power on the usb ports. when i plug in USB fan, or mp3, it works,  
i need to set the switch to off on the back of the psu, to spot it.  
 
is it suppose to be like that?

 
as far as I know, no
 
but i would recommend shutting of the psu once ur done using it for the day, b/c u usually trickle off 15-1 watts. at least thats what I noticed with ym set-up once I used a Kill-A-watt power meter...

yeah that is what i do, but why is this psu doing this..?
can this be a mobo problem? i have gigabyte p35 ds3l
i thought maybe the mobo can put psu on sleep mode even though it is shut down

i gotta be honest its kind of odd, but then again I've never used the Ds3l mobo b4. did you check with gigabyte's forum's, maybe this is a mobo issue, but I would check with corsair first, since it is the PSU that gives power to the rest of the pc...

Check your manual. I believe that there is a jumper setting to change this. However, it is not anything wrong with the PSU.

 
oh cool, I've never seen that jumper b4, maybe its on the ds3l mobo's only?

Agreed. It is nothing wrong with the PSU. My DS3R dose this too.

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E2180 @3.2Ghz + P35DS3L +8400GS (700/475 OC)