14 nm Broadwell vs 22 nm Haswell mobile @ 15 W TDP:
Am I correct in that on average this will result in ~20% higher iGPU performance, and ~4% better CPU performance, at the same TDP?
Isn't that far lower than expected? I remember some saying that the frequency wall was not hit. I.e. FinFet @ 22 nm was a one time penalty, so that 14 nm and beyond would provide increasing frequencies again. Did that not happen after all?
As the chips are for a 15W TDP spec then clocks will only be raised enough to keep it within that specification. We'll have to wait to see what BDW-K can do.
Power savings seem to be in the overall package such that idle powers are quite impressive and this is what will help extend battery life. Running a HSW or BDW at full load, ie hitting the manufacturers 15W power limit, is going to use 15W on either processor with no savings at all.
Possibly peoples expectations of performance were due to the hype from the comparison between BDW-Y (Core-m) and a crippled HSW made to run with a 4.5W limit. With package power improvement in BDW this would also mean more power would be available to the IA cores than would be available to HSW IA cores.
Cinebench 11.5 on the i7-5500U hits ~3.3, also a ~15% increase over the i7-4500U however the 4500U has since been refreshed to i7-4510U with increase in clocks.
What would be interesting to see between 4500U and 5500U during say Cinebench 11.5 or Linpack would be the difference between package power and IA core power.