urgent, need help. intel stl2 mobo, antec sx1440 server case

[andhra]

Hi,
I just bought Antec sx 1440 server case and intel STL2 mobo. The power connection on the mobo is bigger than the one coming out of power supply unit. whats wrong?

 

[TatSteeL]

did you get the right mobo and cases i mean are they both atx or both at? Since you're building computer this question is like a waste, but hey check that