The PCH also moves down to 32nm, helping further reduce power consumption. Bringing it on package reduces the amount of power needed to drive traffic between the CPU and PCH, which in turn helps reduce platform power. The PCH is responsible for all SATA, USB, PCIe 2.0 and other rest-of-system interfaces.
Intel is being frustratingly cagey with giving up real details on exactly what’s going on with Haswell ULT, but here’s what I’ve been able to piece together.įor starters, Haswell ULT brings the PCH (Platform Controller Hub) on-package. It turns out that although Intel did a wonderful job of driving down CPU power consumption over the years, it did nothing to make the rest of the platform keep up. With Haswell ULT, Intel aggressively focused on driving down total platform power consumption.
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