What is SLI?
Scalable Link Interface (SLI) is a brand name for a multi-GPU solution developed by Nvidia for linking two or more video cards together to produce a single output.
[glow=yellow,2,300]OK[/glow]
ATI CrossFire (also known as CrossFireX) is a brand name for ATI Technologies' multi-GPU solution. The technology allows up to four graphics cards to be used in a single computer to improve graphics performance.
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no thanks[/glow]
It means two videocards are linked together so it's faster basically. It has some special requirements, and is generally reserved for high-end gaming computers. I don't think you should worry about it.
[glow=yellow,2,300]Yeah, I don't think I'll need that.[/glow]
What is a minimum graphics requirement?
Don't know what you mean, that is very ambiguous.
[glow=yellow,2,300]Like 256MB, 510MB, 768MB, 1GB, 4GB[/glow]
What is a 3-pin mini din stereo connector?
Don't know.
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OK[/glow]
What are Dual and Single link DVI's, HDMI's, HD out's, Analogs, displayports?
I think you're over complicating things.
Do you connect your computer to a TV?
[glow=yellow,2,300]Nope[/glow]
What kind of cable do you use to connect your screen to your computer?
[glow=yellow,2,300]I use a VGA input[/glow]

Also, your computer requires a PCI-EXPRESS X16 slot to run a videocard, which is what the videocard inserts into. Does your computer have one? To find out, just tell us what model of computer you have, or what the exact model of motherboard you have.
[glow=yellow,2,300]I'll get to that...[/glow]