Then you try explaining how the graphics card for my W500 thinkpad, bought just last July, is completely useless when it comes to civ5's bells and whistles.
That card has a 3650 which has only 160 shader processors and only supports DX9. You can't expect to get all the bells and whistles on a DX9 card, it just isn;t going to happen. also, that new laptop originally came out in 2008 so it was fairly old when you bought it. It may be upgradable though if it uses a mini PCI port and you can update to a DX10.1 or DX11 card to get more features. You can't expect a budget computer to have all the latest technology. You should expect to lose bells and whistles and with laptops you should expect even less as they are designed for business, not gaming. They are designed for low power, so parts have performance lowered to keep power consumption down. Laptop parts usually run at half power compared to their desktop counter part.
Or how the video card for my desktop, bought in 2005, was unable to render the shaders on civ4's leaderheads properly.
Sounds like a driver issue, or even a hardware issue. you have to remember there are also other programs running on your computer putting a load on your system causing performance loss. Try running task manager (ctrl+alt+del) and reporting how many processes are running. By default XP has around 21 processes running on a fresh install. if you have any malware at all, then it could kill performance real quick on a budget system.
In either case, I don't know anything about video cards other than the amount of video RAM, and I haven't seen them explained in terms I can understand anywhere.
The numbers you want to look at are the shader processors. like I said your 3650 has only 140sp, which is way higher than most integrated video have, which is usually around 8sp. If you had a 3870 (top of the line for that series) has 400sp, while a 4870 has 800sp, and the newest 5870 has 1600SP. so you can see the performance differences. These numbers are for ATI. Nvidia has a different way of doing their shader processors and have about a fourth as many of an equivalant ATI processor.
for example: An nvidia GTX260 has around 216 shader processors, while a HD 4870 has 800sp and the 4870 is a little more powerful on average.
If you want more bells and whistles, then you'll need more SP and a better API (DX11)
also, a DX10.1 is probably minimum for lots of bells and whistles. DX10.1 and higher have multi-threading in the GPU, so it can do more GPU tasks at once, while DX10 and older can only do one task at a time. so all DX11 games will have more things going on at once because of this.
-=Mark=-