Psu good enough?

Korrectional

Reputable
Dec 20, 2014
2
0
4,520
System specs

Nvidia 680i lt sli
Intel e8600 @ 3.3gh
8 gb ram 800mz
Nvidia gtx 550 ti
1 hhd 500gb 7200rpm
1 cd/dvd combo

Will a 550w ultra x-connect 2 power it all. I'm asking because the gpu i got says it needs 24 amps and the 12v. But mine says 18 amps on 12v1 and 18 on 12v2. Does that mean I plug one of the two molex cables into the 12v1and another into the 12v2? Help me out I don't understand this at all.