When Nvidea brought out the GT 430, it had as an advertisement that it was designed for CivV. The 6150SE N 430 must have been an earlier chipset identical. I realize that the 430 numbering scheme may or may not have anything to do with it.
I have always assumed that if the command to "launch" the game via commands sent to the GPU were not recognized by the GPU, the computer either does nothing, crashes, or eventually sends back an OS system error. Most people just complain that the computer does nothing. I realize that is not very technical (due to specs) troubleshooting, but more of a trial by error way of doing things.
Personnally I just kept putting the video cards I had laying around, until I got one to "work". It was only after these failed in others games, I then went out and purchased a new card. I happened to see the 430, and it was on sale so I bought it. Later my son said that his Roblox was now laggy. Not sure why Roblox would work fine with an older GPU instead of a newer one though.
I thought I was scraping the bottom of the barrel with my Nvidea Geforce Go 7600, but Cain3456 and David Squires has me beat. Based on the experiences I have had, it seems that the video card may not be the main bottleneck when it comes to turn times though. If the graphics are acceptable at the beginning of a game and even in the demo, it is not the graphics that change in the end game. It is the amount of resources being processed. Even turning off animated actions, even if the AI has all the resources, it still bogs down the game, and that has nothing to do with showing the graphics on the UI.
You are welcome