Getting extremely low speeds

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http://ubuntuforums.org – I finished building my computer a day ago, and now I'm facing with this problem. I have a wireless card (Asus PCIE N10) installed, and I'm getting speeds of 0.77Mbps on speedtest.net. When I try the same test on either my laptop or Windows 8, I get around x10 that speed (6-7Mbps). After googling a bit, I logged into the router and tried to change the channel to 11, it didn't work. I also tried to install the drivers that came with the card, but they can't be installed in Ubuntu versions older than 10.10. So I'll trust you guys with this one. Thanks! I'm using latest Ubuntu 13.10. Output (Hardware)