Hyper Pi uses a workload very similar to Super Pi, but is adapted to make use of more than one processor thread.
We used Hyper Pi's ‘8M' benchmark setting and ran it on the maximum number of threads for each processor, with the ‘Realtime' priority setting.
Despite placing a single-threaded, pi-calculating benchmark on each processor thread, the quad-core, hyper-threading 4770K still manages to outperform IVB-E's 6 core, 12 thread part by around 10%. A similar performance advantage (to that of Super Pi) of around 7% is observed for the 4960X over the 3930K.
As was the case with Super Pi, the FX-8350 is omitted from the Hyper Pi test as AMD's parts are known to have an unfair disadvantage performing with Hyper Pi's x87 code.