Antec TruePower 550

Thank you man, btw before I have a 300W PSU that come with my case, can you please tell me if this new PSU will improve performance on my system and how?

I don’t know too much about comp, again thanks
 
It will not improve the perfromance of your system but it will all you to install more components into your system. It may also give you a more stable system.