I'm trying to get my pc up to snuff so I can use it for gaming. I know all the hardware I need except for the graphics card. I have one already installed and in use, but I'm not sure whether or not I need to replace it. All the forums I've looked on say a gddr5 runs a lot better than a gddr3 but I'd rather not spend money on something I don't need to buy. The specific model of my graphics card is a Radeon HD 5450 and it's a GDDR3 with a 512 MB memory.