What does multimedia instruction mean in regards to a CPU?

[ghastaphish]

I'm looking at either the intel G850 or G860, and I noticed that they have different "multimedia instruction." What does this mean? The 860 is faster (3.0ghz) and cheaper, but the 850 seems to have more multimedia instruction? Which one is better?

 

[noidea_77]

Don't care! It makes now difference, because they are rarely used by programs anyway. http://en.wikipedia.org/wiki/SSE4

 

[ghastaphish]

Best answer selected by ghastaphish.