greetings,
in most of the time while searching graphic card i user to hear terms like "over threading and over clocking " what are these can anyone explain it clearly please.
Perhaps you saw the term "hyper threading", but wrote "over threading" in this question?
Hyper threading is a technique that emulates 2 microprocessor cores, using 1 actual computational core.
http://en.wikipedia.org/wiki/Hyper-threading