Procesadores AMD RYZEN

We'll start off with Piledriver (specifically the FX 8320 @ stock 3.5 GHz). It will be our controlled variable, and for the sake of simplicity, we will have its IPC = 100.
Steamroller is 10% faster than Piledriver -> 100 x 1.10 = 110.
Excavator is 5% faster than Steamroller -> 110 x 1.05 = 115.5.
Zen will allegedly be 40% faster than Excavator -> 115.5 x 1.4 = 161.5

Now, let's go to Intel. We will start at Ivy Bridge, specifically the 3770K @ 3.5 GHz, since it's release date is somewhat close to Piledrivers & the clock speed is identical.

Ivy Bridge is 49.5% faster than Piledriver -> 100 x 1.495 = 149.5
Haswell is 4.73% faster than Ivy Bridge -> 149.5 x 1.0473 = 156.6
Broadwell is 6.45% faster than Haswell -> 156.6 x 1.0645 = 166.7
Skylake is 4.24% faster than Broadwell -> 166.7 x 1.0424 = 173.7

Now, let's rank them

Piledriver = 100
Steamroller = 110
Excavator = 115.5
Ivy Bridge = 149.5
Haswell = 156.6
Zen = 161.5
Broadwell = 166.7
Skylake = 173.7

So, in a perfect world, and if the 40% increase holds true, Zen should be somewhere between Haswell performance and Broadwell performance clock for clock (since we started with an 8320 @ 3.5 vs a 3770K @ 3.5).

So yeah, that's basically it. Of course, there are discrepancies here and there that make this just an estimate, but that's why it is theoretical.

EDIT It has come to my attention that the difference between Excavator and Steamroller is (more than likely) greater than 5% and closer to 12. Thank you /u/Nearika for pointing this out.

"The major flaw here... is that all of this assumes we know the IPC of Excavator is 5% faster than steamroller, but since there are no Excavator chips in the market that go above 2.1Ghz at stock speeds. We have no way of knowing if the number is actually 5%. With some rough math. Excavator cores actually appear to be about 12% faster than Steamroller cores in single threaded instructions, not 5%. So, if you re-do your math with this number. That puts Zen at about 172.5 IPC, which is in line with Skylake. Not to mention that most recently they have said Zen performs beyond that 40% increase in IPC over Excavator."

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