No - 512mb is twice as much as 256mb !
normally i would say the 512mb but it depends on the price and quality
the 8400 is the better card
cant see why not
It won't run.
the 8600gts is a better choice in my opinion. just make sure your computer can handle it
id put my money on the 3650
Minimum requirements on the box say 512MB of ram.
Well, you can just replace the graphics card with a 512mb card or a higher one.
No.
XP - 256mb (1gb recommanded) 98 - 512mb (recommanded)
Yes, yes its much better. Games very rarely use more than 512mb graphics memory. Thats right, 2gb cards are a total gimmick.