I have a Dimension E520 and I am planning to upgrade my video card. I decided to purchase a radeon hd 4670.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814161315&cm_re=HD4670.-_-14-161-315-_-Product

I researched and people said it will work fine on the system, but I've also seen people buying dual slot cards and it ends up doesn't fit the system because of the narrow space the desktop has.

I don't trust Dell system specification because they said my computers maximum ram was 4 GB and maximum ram per stick was 1 GB. It ends up the max ram was 8GB and 2GB per stick.

So basically i am asking will the HIS radeon hd 4670 I've shown above will fit on the desktop? And will I need to upgrade my power supply? I am afraid that it will burn up the system while doing some gaming. I currently have a E6600 (core 2 duo) and 3 hard drive. ( According to dell I have 305 watt right now....)
If the graphic card above doesn't work please give me some suggestions.

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