I actually heard somewhere on the radio this morning advising people that Broadwell makes no sense whatsoever and we should just wait for Skylake because Skylake is right around the corner. Not sure what Skylake has to offer but something about wireless charging.
It makes sense for some people depending on what type of mobile computer you are going to buy, let me try to simply explain.
Core M is the very low tdp version of broadwell that you will find in many tablets or other devices that want to go fanless. These will have an integrated pch and will be a different chip than what you see with the 35 ish watt + processors. Those chips will not have an integrated pch and will have a seperate chip on the board for that. In effect if you want a socketed laptop cpu you have to wait much longer but if the chip is bga you can get it prior to christmas.
This next entire paragraph is Speculation. Why is intel delaying the release of mainstream broadwell laptop chips is due to either intel is having yield problems on 14nm or they can't produce enough chips at 14nm and thus they are going to release the chips with the most profit and wait for longer on the more mainstream cpus. Haswell in the 37 w / 47 w range is already a good chip and the improvements you will see on these chips via going to broadwell will be in the graphics and you will not see as much as battery gains on these chips.
According to Intel We will see the more "mainstream" Broadwell chips not this year but sometime next year. We will also expect to see "mainstream" Skylake sometime at the very end of 2015 so in other words christmas.
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Now Skylake from a design point of view is
more or less finished. They could
in theory drop just abandon Broadwell and just print Skylake cpus right now for the most part and have very little delay.
Here is why they won't do it.
Both are 14nm chips but Broadwell is the larger of the two so unless you can get a higher price why would you release the bigger die if you are already capacity constrained due to poor yields and/or just not having enough 14nm wafers coming out of the fabs.
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For simplicity sake think of Core M and normal Broadwell core as different as laptops 47 watt quad cores and the i7 unlocked desktop quad cores with 88w tdp. They may have the same architecture but they are different with a different socket and everything. They have different pin counts and everything one has 946 pins the other 1150.
To my understanding we also won't see many broadwell desktop chips with the ones we will see being marketed with better graphics for things such as All in Ones. This is going to happen for they are going to use the 14nm capacity for core m, laptops, and atom and keeping a lot of the desktops on 22nm until they have enough capacity to do everything on 14nm.