beeps after installing a new PSU

[Mohamed_S]

recently i bought a new PSU which is XFX TS 430 ( P1-430S-XXB9 ) for my budget pc
after installing the new PSU and turning on my pc
it keeps beeping and the pc shut down after windows start with few seconds
so is it the model of the PSU which doesn't fit my pc ? or is it a damged PSU which could be replaced with another unit of the same model ?
btw my pc specs are
Motherboard : Gigabyte GA-G41MT-S2PT
CPU : Core2Due E8400
GPU : Gainward GTS 450 1GB edition

 

[popatim]

Check if your cpu fan is spinning?

 

[Mohamed_S]

Check if your cpu fan is spinning?

it is spinning