no, it's just most people are on haswell refresh, with cou's such a i5 4690k or 4790k or AMd equivalents and the boards that can house these can oonly run sli at x16 x8 or sometimes even only x8 x8, thus not having the best power from the dual cards. Now, broadwell, their boards can actually utilise both the cards at their full potential, at x16 x16, so it's not the cards themselves, but teh boards not being able to take advantage of their power