The thing is though, the original i7's came out in 2008 and were already hitting 4.2GHZ.
Intel CPU's prior to that were hitting 4GHZ.
By 2010 AMD had some decent clocking silicon too (I had 4.37GHZ Thuban), so I have no idea what AMD's plan was, as their IPC in Bulldozer lowered so much, half the time the clock speed couldn't offset that lost IPC against their own chips.
So it didn't make much sense, even if things had gone to plan, as AMD were competing and losing against their own previous flagship.
Intels clocking is actually so-so since they've been using none soldered IHS's, which I hope they rectify in the next mainstream platform.
Although Marine has a point.
Lets say the FX8350 has a power level of over 9000 in its 8 cores (So, about 1125 per core) and the Intel has a power level of 8000 (2000 per core)
In a 4 threaded situation, the FX8350 can only use half its power ; 4500, while the Intel will be able to almost use its 8000.
That's what he's on about the 50% thing.
So its lower performance comes from the fact half of the CPU is idling.