Video cards are expansion cards that generate output images to a display. Yes, video cards and graphics accelerator cards the same thing.
The most popular seller of any computer parts not just video cards is newegg.com. If you want to compare video cards I would recommend gpureview.com.
Some video cards do, and some video cards don't. You can buy a vga -> dvi adapter, though.
Garry's Mod requires a DirectX 8 video card or higher which is most cards made in the last 4 years.
Mostly all video cards have output jacks. It depends on what kind of output jack you're looking for. monitor outputs are found generally on all video cards, standard yellow video jacks are on most video cards (easily found at places like Best Buy or Circuit City).Anything more advanced than that you may need to look up video cards on the internet. Video cards on retailer shelves are usually pretty limited.
Someone can purchase computer video game cards from a number of companies such as Amazon. Amazon has a large selection of computer video game cards from numerous manufacturers.
You can find video capture cards in places like amazon, newegg, and websites like that. They offer only the best find of video capture cards and I recommend it.
Video cards are hardware, not software. They cannot be "downloaded", free or otherwise.
any pci or pci-e video card. such as ATI Radeon video cards (not agp ones) or NVidia GeForce video cards (again, excluding the agp ones)
Yes, video cards include their own RAM, called video memory.Source: Page 288 of Technology in Action 8th edition
That would depend greatly as to how far back do you want to go? Video Cards (NVIDIA, ATI, to name a couple etc), Video Capture Card, ATI Video Cards, PCI Video Card ... are just a few of the types, not to mention the various models of each card that exists.
Apart from a basic built-in video cards such as an Intel-integrated graphics card, many brands compete to offering the best video cards, namely Nvidia GeForce and ATi Radeon. Another noticeable company is AMD.