I just got a Dell Dimension C521 as a second computer. The problem is that the tower is incredibly narrow. It is the thinnest computer tower I've seen when looking at its width. The issue is that I want to upgrade the graphics capabilities of the machine so that I can run some of the MMORPG games I like to play. I can see through doing some research that I'm going to have to go with a low profile/half height card to fit this case chassis. The Nvidia Geforce 6600 I had will not fit it because of the chassis. It is a pci express x16 connector. My question to you is this: Is it true that low profile/half height graphics cards are usually inferior to their full sized counterparts since they are smaller and make it difficult for manufacturers to fit chips/transistors, etc? I think I read this somewhere and I wanted to check up on it. My only options are to use low profile/half height cards or to swap the system out for one with a full sized tower. Thanks for your input!