With channel bonding, it is possible to get 50mbps download speeds*.
* Note: If there is anyone nearby using an overlapping channel, your
router will automatically switch off bonding & the router falls back to 150mbps or slower, which translates to ~40mbps (real world speed).
Set your router to 20Mhz on the N band (150mbps mode) & update your
laptop wireless card driver. Your laptop should be able to connect, it your wireless card supports N mode (2.4Ghz).
With G mode, 19 mbps is the average real world speed. B is even slower.