I have a MSI-740GM-P25 Motherboard and Im looking to buy a graphics card to play some relatively new games! It has a pci-e x16 slot and I am wondering what is the difference between the various type of memory each graphics card has! The motherboard itself has DDR3 memory. What card would be compatible with this motherboard and what card should I get for a cheap price that will play games like Dead Island decently. Thanks In advance