Ube, sorry if i sound a bit rude/blunt, but have u checked out the links i recommended?
Webopedia How Stuff Works PC Technology Guide they will explain to u those terms like DDR, SLI, dual-channel, dual-core, etc.
what u should ask is how advantageous are those technologies compared to the previous ones in real life situations. now such questions can be answered with authority by Morbo & Lady Rain, since they do own such hardware & have done real life tests.
another good sites are;
Tom's Hardware Guide Anandtech @ Lady Rain -> wow! i didn't know that ATi has THAT poor of a driver handling! <img src="/ubbthreads/images/graemlins/eek.gif" alt="" /> crap! now that i'm on ATi Radeon 9000 Pro (can't afford better since there are other things in life that need higher priority) as my first Radeon since i want to try out the alternative to NVidia. true that NVidia has the easiest driver installation & also simpler configuration which makes the hardware manageable to casual PC users. as for ATi, it confuses even me who normally has no problem diving into hidden settings & obscure vocabulary in manuals. which is why i use omegadrivers version of drivers for my ATi card since it's a lot better than the original Catalyst.
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