help me with this psu question

Solution
What you need to realize is that the opening on the back for the PSU is just a big hole. There are no separate cutouts for the PSU power cable, the fan, or anything else.

So what? That just means that the second you plug in the power cable for the power supply, it'll just be on? Are you seriously finding a problem with an extra power switch?
 
Really? It looks like a pretty big cutout to me. If you can mount the XFX TS 550W in there, the power switch would just stick out of the cutout. Regardless of the orientation of the power supply, the power switch will always be located in the inside portion of the cutout, so it will never be cutoff by the railing on the right side of the cutout (according to the image you posted of the case) and it will never hit the top left mounting railing either. So as long as the power supply fits and you can mount it properly, I don't see why it would not have a space for the power switch. If I am missing something, please correct me. I don't have that case so I am only going off the image that you presented.
 
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I don't see how this can be a problem.
 
Do me a favor. Take a picture of your case or use an existing image of the case in the site you linked and do a quick sketch (MS Paint?) to illustrate what you are talking about. Clearly, you either have no idea what you are talking about, which reflects in not understanding what we are saying, or you simply need to hire someone else who is more tech-savvy to assist you in translating what we are saying.
 
I'ma second this, PSUs are meant to fit nearly everything. It's the one part of the computer where almost any PSU will work, there are SFF and Server PSUs, but you have a regular PSU and are looking at a regular PSU. Show us a pic of the back of your puter where the PSU was, else, it's gonna fit, and I second, TROLL POST! :)
 

We are trying to help you but if you don't understand what we are saying and are repeating yourself without illustrating to us where your confusion lies, how are we supposed to make it any clearer? Would you rather have everyone here just ignore you because you are just posting comments that are not helping us help you?