I need a 400-500 watt PSU that will fit into my hp 2220t case?

[imnotagamer007]

I am buying a new graphics card soon and although I think my 300 watt will be sufficient enough to handle it, I'd like to be safe and get a 400/450 watt PSU just to be sure. The problem is my computer case isn't very large and there isn't a lot of room for extra wires that come with some of the fancier PSU's like corsair. I actually have a corsair 500 watt but it's too big to fit inside my case. So I need a small psu that will fit. Any suggestions?

5.5 x 5.9 x 3.4 inches are the dimensions for the corsair PSu that won't fit inside my case

 

[vlxedits]

Need more info. Is it a mini-itx case? If so, then there are very limited options and they're pretty expensive.

 

[Nightman]

This guy's pretty tiny, but you should measure the spot for the PSU to figure out exactly what size you need.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817256063

 

[imnotagamer007]

Need more info. Is it a mini-itx case? If so, then there are very limited options and they're pretty expensive.

It says the case is mid-sized. http://www.pcworld.com/product/pg/1010960421/detail