Well, I'm going to buy the Sapphire Radeon 4870. But I can like barely afford it and I'm not sure what to buy the 512mb Ddr5 or the 1 gb of ddr5. I'm in a tight budget so does the extra memory really make a big difference. I have a 1680x1050 22" Monitor. This is my computer Gateway Official Site: Shop - Desktops – LX6200-01 Product Details - LX 6200 01 Product Details. I would be able to afford the 1 gb one easier but I have to get a new psu because I only have a 400 w supply. By the way do you think it will fit in my case? and which psu should I get thank you . Or if you recommend another graphics card tell me.