I'm building a pc for my cousin 
I'm trying to make it entirely like my own pc.Specs:
i5-2400 @ 3.1Ghz
4gb Corsair Vengeace Ram.
2tb HDD x2
1 DVD-RW Sony.
1gb Nvidia Gtx 560ti.
The thing is, I have Seasonic sii- 520W PSU which have 40A @ +12V
My cousin is short on some money for the PSU so I was thinking of going with a cheaper Cooler master Extreme 550W which have only 18A @ +12V rail.
will the gtx 560ti be good running good on that cooler master PSU or will we be having problems?
__
He is not a extreme type gamer and his monitor is just like mine with max resolution of 1600x900 {He won't be buying a new monitor anytime soon}
Thank you for your time reading this

I'm trying to make it entirely like my own pc.Specs:
i5-2400 @ 3.1Ghz
4gb Corsair Vengeace Ram.
2tb HDD x2
1 DVD-RW Sony.
1gb Nvidia Gtx 560ti.
The thing is, I have Seasonic sii- 520W PSU which have 40A @ +12V
My cousin is short on some money for the PSU so I was thinking of going with a cheaper Cooler master Extreme 550W which have only 18A @ +12V rail.
will the gtx 560ti be good running good on that cooler master PSU or will we be having problems?
__
He is not a extreme type gamer and his monitor is just like mine with max resolution of 1600x900 {He won't be buying a new monitor anytime soon}
Thank you for your time reading this










