i have an intex case that came with an intex psu 450wsingle 12v rail:18 amp,i am thinking to change the psu and get a quality psu, corsair vs550 watt psu now my concern is that will that psu fit in my case???? dimensions of my case is LxWxH: 36.5x17x33 cms. currently i'm running a microatx motherboard in the same case... and can you please tell me in which category does my Case belongs?