These different names indicate different generations of the "core i" CPU's from intel. The 2nd generation "sandy bride" chips are good but are a little old now. The 3rd gen "ivy bridge" cpu's are the pinnacle of this architecture with the best power to performance ratio. The 4th gen "haswell" chips are a step backwards as they do not offer a significant performance increase over the previous generation, use more power, run hotter and cost more as do the 1150 motherboards needed to use them. I hope this helps a bit.