Quote Originally Posted by terrace215 View Post
BTW, IPC gains are higher than thought.

In addition to the L3 cache being smaller on Sandy, the other Westmere comparison parts were allowed to Turbo (!), so it is not clock-for-clock at all, particularly on single-threaded workloads.

The i7 880 can hit 3.73GHz, 20% higher clock than the non-turboing 3.1GHz Sandy.
I see no IPC gains, which you preached about some time earlier. Maybe you meant single thread performance boosted by turbo?