CPU World is reporting the different configurations that Intel's upcoming Haswell processors will come in, with respect to graphics core, memory channels, and processing cores. Some of the configurations break from the current Ivy Bridge in that the highest performance CPUs don't have the highest performing GPUs.
This actually makes sense in that a user who buys a top CPU will likely be running a discrete GPU. Intel is offering at least two different graphics configurations which will be joined to dual- and quad-core parts. The dual-core parts will also have a variation in that they may only come with one memory channel.
The graphic above summarizes the different configurations we are reportedly going to see with Haswell. Each memory channel will support either one or two DIMMs, with the ULT (low power) chips seeing the one DIMM per channel memory controller. Each DIMM will have a maximum capacity of 8GB, so the lowest amount of memory (or highest, depending on point of view) will be 8GB on the ULTs.
We're still a good distance from the release of Haswell, so it's a good idea to take these configurations with a grain of salt. That said, they do make sense, so it's not unlikely that they are accurate.