Next Year’s 32nm Mobile Westmere Nehalem: The Dual-Core Arrandale
The next step for the Intel Nehalem’s march to mobility is Arrandale. Along with its desktop counterpart, Clarkdale (note there is no s, as opposed to the Clarksfield above), they will be the world’s first 32nm processors. It is similar to the Clarksfield, sharing Nehalem features like TBT and Hyper Threading, and Ibex Peak features like not having a northbridge.
Other than the 32nm, Westmere, process (Clarksfield is still on 45nm, or Penryn) and being two instead of four core, the biggest difference between Clarksfield and Arrandale is that the later has integrated graphics. Yup, the graphics are integrated right onto the processor (well, right beside it, see picture at left).
That has many benefits in terms of size, less bottlenecking, power consumption, and even cost reduction. Unfortunately, the first CPUs with integrated graphics will use a somewhat improved version of Intel’s GMA 4500 currently found on Series 4 chipsets. The choice to modify the uncompetitive GMA 4500 for integrated CPU graphics is discussed here.
The resulting difference to the Calpella platform is that Arrandale version will have something Intel calls Flexible Display Interface to move display output to the southbridge (picture below). It still has DMI for other CPU-southbridge communication.