I have the exact same model and upgrading the graphics card was a big pain. There were so many good cards at a cheaper price, but I couldn't get them because they were too long or fat. I had about enough of this problem and just decided to build a PC, seeing as the motherboard was running on the dated socket 775 anyways. This was the card that actually fit in the slot (http://www.newegg.com/Product/Product.aspx?Item=9SIA1N82KS5514&cm_re=r7_240-_-14-121-799-_-Product). I didn't buy it at that ridiculous price, thankfully I got it way cheaper on eBay.