Is my psu sufficient for my pc

[anurag punk]

I recently purchased a cooler master 400w psu ( 17amp on 12v rail ) but the problem is that i think i have been looted with a local 250w psu with a cooler master sticker because it makes the same grnding noise that was made by my last psu ( i ball 250w ) but how can i check if its real cooler master or its really a 400w psu and if it is 400w ( cooler master or any cheap 400w psu ) will it be sufficient for my pc .
Here my specs
intel core 2 duo e7500 @ 2.93ghz
ram-2gb
hdd-320gb
gpu- sapphire radeon hd 6670
mobo - asus p5kpl am in
please help me out .

 

[FinneousPJ]

Only 17A on the 12V rail is pretty much insufficient for any modern system.

 

[ko888]

What is the Cooler Master Model Number?

Is it an eXtreme Power Plus model?

 

[anurag punk]

No its an elite rs400 psar j3

 

[ko888]

For a system using a single reference clocked Radeon HD 6670 graphics card AMD specifies a minimum of a 400 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 20 Amps or greater.

The Cooler Master Elite Power 400W (RS-400-PSAR-J3), with its combined +12 Volt continuous current rating of 23 Amps and with one 6-pin PCI Express supplementary power connector, is sufficient to power your system configuration with a single Radeon HD 6670.