I am currently running a Nvidia GeForce4 Mx 420 64MB on a Dell 4550 2.4 with 512 RAM. I want to upgrade the video card, but not break the bank. So, less than $50. I'm saving for a new PC. I'm not happy with the performance in Microsoft Flight Simulator 2004, on average I get around 15 FPS. I'm not too tech savvy so I have quite a few questions: How important is the Clock Core speed? Is it more important to get higher memory or clock speed? 128 or 256MB, will there be a huge difference? Any opinions on : Radeon 9200 9250 9550 9600? Should I stick with Nvidia? any suggetions on a Nvidia card? What's the difference between AGP 2x, 4x, 8x ? Is it worth it to pay $35 for a Radeon 9200 SE 128MB PC Video Graphics Card? or should I get something newer?