Broadcom claims first Wi-Fi chipset for PCI Express: PCI Express is the next next generation of motherboard-based expansion technology with a higher-speed switched bus architecture for better throughput. PCI Express (PCIe) can push 1 Gbyte/s of data; even the fastest proprietary flavors of 802.11 support about 3 to 4 Mbyte/s (30 to 40 Mbps), so it's not a stretch to have multiple cards in a single PCIe chassis, even. The Broadcom chipset is sampling now.