The ASUS PCE-AC66 802.11ac wireless PCIe adapter is currently the only wireless adapter I know of, that allows you to experience the wonders of 3-Stream IEEE 802.11ac Wi-Fi. It won?t be the last, for sure, because the gains in wireless throughput are too good to pass up. There are several significant changes in the new 802.11ac standard, and upping the maximum allowable number of spatial streams is one of them. Theoretically, eight individual streams are supported by 802.11ac, but the new chips from Broadcom top out at three streams on a single IC. That?s enough to push 1.3Gbps across the airwaves on the 5GHz Wi-Fi band, which is probably where the consumer devices will stay. There are several wireless adapters on the market that are capable of handling two streams, but right now the PCE-AC66 is alone at the top of the 802.11ac heap, with three streams and the data rates to match."
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