new PS 520W making strange noise

[_King_Pin_]

* OCZ part number:-ocz- 520ADJ EU
* Module size and kit size:-ocz PC3700EB
* CPU model and rated speed:-A64 3200+
* Overclocked CPU speed:-2600Mhz
* Divider and FSB used:-183
* Motherboard and revision:-DFI NF4 ultra-D
* Motherboard Bios rev:-310P
* Video card:-6600GT
* Power supply:-ocz powerstream 520W
* Operating System:-XP SP2
* CPU and System Cooling:-Air cooling
* CPU and System temps:-cpu 48º full load
* Purchased at/on:-Aquapc today- 19-4-05
* Country:-Portugal


Hi
I´ve just bought this psu.
It doesn´t have de switch to change between 110V and 220V (mine is 220V AC)
I first picked an atx connector to turn on the psu before connecting it to my system, and turned on the psu.
Strangely it started doing a strange noise from inside of psu!
It isn´t from neither of the fans, it is really inside de psu...
If I just connect the psu to electricity with the buton turned on it steal does the sound but in a low level.
What is this strange sound? Is it normal?
Thanks

(PS: Hope my english could be understood by you...)

[RyderOCZ]

You english is fine and I got you handled at the BE forum :)