Intel's 5th Core processor family, codenamed Broadwell, will launch in three lines for the mobile segment. We are talking about upcoming Broadwell 14nm processors that will start appearing in Q4 2014 and will continue to launch trough the first half of 2015.

The 5th generation Core 5Y70 and three other similar parts belong to the Y-line of processors. these are BGA processors with 4.5W TDP and they draw significantly less power than the Y-line of processors belonging to the Haswell generation. The Haswell Y-processor line has a TDP of 11.5W and 4.5W - 6W Scenario Design Power (SDP). Since Intel is doing fine with 4.5W TDP on Broadwell it doesn't use the imaginary SDP rating for the 5th generation of Core processors.

Y, U and H-processor lines

The second to come is the U-Series line that comes in BGA and TDPs ranging from 15W to 28W. Remember Broadwell 5th generation Core has graphics inside as well, so these power figures sound quite good. It replaces U-series line of Haswell 4th generation parts that also has a TDP of 15W to 28W.

The last of 5th generation mobile processor family is the H-processor line that comes with BGA and whooping 47W TDP. This one is meant for the high end systems and Intel has U processor line with Haswell with the same TDP and a lower TDP version that had 37W maximum thermal dissipation.

No Broadwell M-series 37W, 47W and 57W parts?

One might notice that Intel doesn't mention the M-processor line that is available in Haswell flavour, but this processor line is not mentioned in the current roadmap.

Broadwell 5th generation Core U-series line starts in Q1 2015, Broadwell 5th generation Core Y-series line starts in Q4 2015, while the H-series line starts appearing in Q2 2015.

Bay Trail-M also known as N-processor line with its 7.5W to 4.3W TDP and 4.5W and 2.5W Scenario Design Power will stick around until it gets replaced by more efficient Braswell designs in Q1 2015.