Why is the focus on these CPUs important if you want the discrete GPU? Because, yes, it is also very likely that, after the Haswell refresh runs its course, the Broadwell round of 4-core mainstream desktop CPUs early next year may only have PCIe v.2, not v.3 enabled. Yes, you may call Intel “real bad”, but basically they want to entice you to use the “Iris Pro” GT3e graphics that Broadwell mainstream desktops will have on top four-core SKUs, and pay a bit more for Haswell-E and Broadwell-E higher-end platforms if you want to use – non-Intel, of course – discrete GPUs. Such is life.