broadwell y vs cherry trail

[liahos1]

Question I have is I seem to be a bit confused as to where broadwell y fits vis a vis cherrytrail.

If they are both 4.5w TDP's what is the point in selling both?

Is a 4.5w Core product's performance structurally faster than a 4.5w Atom?

 

[witeken]

Cherry Trail: everything below $600
*Slower Airmont core (single thread)
*Quadcore
*16 Gen8 EUs

Core: above $600
*Bleeding edge single threaded performance because of Core architecture up to 2.6GHz
*Dualcore
*24 Gen8 EUs

Airmont really is for the mass market; all cheap tablets. You probably won't find an Android tablet with Core soon (maybe together with Windows).

 

[liahos1]

but how do those both exist within a 4.5w tdp? Is Cherrytrail integrating more on die vs broadwell y?

 

[witeken]

Because that's what you need to fit in a tablet. BTW, where do you have the 4.5W for CT from? Z3770 already has an SDP of 2W, so its TDP should be less than 4W. The 14nm process will cut >30% off of its power consumption (although the GPU become much beefier).

So CT's TDP is just what you get with a 2.7GHz Airmont core and 16EUs, Core's is what you get when you clock it down to fit in a fanless tablet.

 

[liahos1]

ahh makes sense. i just assumed ct would be 4.5w since that would be upper bound for tablets.

 

[liahos1]

anyone want to hazard a guess as to how fast a broadwell y part would be relative to say a the i5 or i3 in the surface pro 3?

 

[Roland00Address]

We do not know the performance yet of either chip.

But even if both chips had the same multi threaded performance, then broadwell will likely have double the single threaded performance and in some stuff this is a very big deal.

Likely Broadwell will be faster, but it will cost more to the user, just like it costs intel more due to the greater die space and lesser yields due to the large die.

----

Also Atom is meant to scale down and get into phones, while broadwell is meant to scale up and go into normal tablets, laptops, aios, desktops, servers etc. Just because there is a small overlap does not mean both architectures are not useful.

There is a limit how much you can scale down and scale up an architecture. Anandtech says it is about a 10x range.

well Atom is 10 watts and lower to the sub watt range (10 watts being desktop parts and things like networked attached storage).

Broadwell will be 4.5 watts in tablets all the way up to 150ish watts in the largest of servers.