Your link does not work. The URL is too long so it gets shortened.
When you want to post with a link do not use the quick reply box. Click on the PostReply icon to your left to get to the "advanced" posting screen.
When you are ready to post a link click the button to the right of "C/C++" button which looks like a chain link. Click and you will see "url" "/url" (the quotes will actually be brackets). Paste the link inside and it should work.
Best advice I can give is to measure your current m-ATX power supply and match it to the one you want to buy. I thought all m-ATX are the same size, but after recommending one to a forum member last year, the m-ATX PSU did not fit the m-ATX case. It was slightly smaller and the case wasn't one of those m-ATX case which uses a full size ATX PSU.