Allright so I had a ATI Radeon™ HD 5700 Series graphics card , (http://www.amd.com/us/products/notebook/graphics/mobility-radeon-5000/mobility-radeon-5700-5600/Pages/mobility-radeon-5700-5600.aspx#2) and it recently "burnt out" or died. Im looking to replace it and this card is on sale, ATI Radeon™ HD 5800 Series, (http://www.amd.com/us/products/notebook/graphics/mobility-radeon-5000/mobility-radeon-5800/Pages/mobility-radeon-5800.aspx#2). My mother board specs are here. (http://www.msi.com/product/mb/790XT-G45.html#?div=Detail). Are they compatible? (I imagine they would be as they are very similar, but I just want to make sure). Also is the graphics card I want to buy a step UP from my previous one? It looks like it to me as it has more transistors and stuff but again, im no expert. Thanks for your help!