The Wireless Bandwidth is either 20 Mhz or 40 Mhz as shown. On the CGN3, unlike most other third party routers, the bandwidth is not adjustable. Where does this chart come from out of curiosity's sake? If you just picked up the modem, it probably has firmware 4.1.4.1 loaded. The next version, 4.2.4.3 will take 4 to 5 days to be pushed out to it by Rogers.