Techradar posted Asus RT-AC68U Review
A quote from the article:
Much like its RT-AC66U precursor, Asus's RT-AC68U Dual Band Wireless AC1900 Gigabit Router resides at the high end of the consumer router category. That said, the high price equates to remarkable performance, compliments of some upgraded internal components.This router incorporates Broadcom's new BCM4709 Wi-Fi chipset, the cornerstone of which is a 1GHz, dual-core ARM Cortex A9 processor with 802.11ac support, theoretically up to 1.3Gbps. The chipset also offers accelerated 802.11n data rates of up to 600Mbps, thanks to Broadcom's proprietary TurboQAM technology.TurboQAM ups the speed of each of the router's three data streams to 200Mbps. It is important to note that this isn't good news for everyone. While most homes today do have a large number of devices that operate on the 2.4GHz frequency, these devices need to have TurboQAM-compatible clients to achieve maximum performance. As it stands, you'll still see a decent performance boost on this frequency, but we'll get to the benchmarks shortly.Asus RT-AC68U Review @ Techradar