Intel has developed a new chipset to support the advanced features in its fourth-generation Core-series CPUs. The biggest changes are related to input/output—the various pathways through which data enters and exits the PC. Intel has also jettisoned support for some old technology; namely, the PCI bus. There are several chipsets in the 8 series, but we’ll focus on the high-end Z87. A computer using the Series 7 chipset that supports third-generation Core processors can have a maximum of 14 USB ports, but only four can be fast USB 3.0 ports (USB 3.0 can deliver data-transfer speeds up to 4.8 Gbps, where USB 2.0 maxes out at just 480 Mbps). Since most PCs had a mixture of both, the older USB 2.0 ports would be identified by black collars and the newer, faster USB 3.0 ports would have blue collars. The Series 8 chipset also supports 14 USB ports, but as many as six of them can be of the USB 3.0 variety. What’s more, all 14 ports are managed by Intel’s eXtensible Host Controller Interface (xHCI), which is considerably more power efficient than the previous solution.