In a series of recent Linux kernel driver patches AMD provided further details of the family 17h processors. All these findings let the 40% claim look more likely. What they don't tell you are achievable clock frequencies and power demands. So discussing absolute performance is moot at this time still. Some highlights (or "lowlights" for some - as you wish ): GMI link confirmed (first appeared on Fudzilla slide) FMAC units are no longer tied to the FP3 pipe as said in the October patch - this could mean no bottleneck here - and maybe some other trick (the FP3 wasn't there by accident) uOp cache 4x parallel page table walker (Skylake has 2 per core) Checkpointing and atomic ops mentioned (could mean finally some HW transactional memory support after proposing it in 2009) 4 cycle latency 2R1W 32kB L1 D$ I also updated the microarchitecture diagram: In depth analysis on my blog: http://dresdenboy.blogspot.com/2016/02/new-amd-zen-core-details-emerged.html Edit: Fixed a typo.