So, I have an AEBS with a 5Ghz network, all my machines have a great signal and speed: My macbook, a 2Ghz C2D with 4 GB of ram, runs normally. On the same network, my 2.4 Ghz iMac with 4GB of ram is dog slow on the internet. Often, it will not even pull up a page and say that Safari can't open the page because the server is not responding. The exact same website works fine on the MB. I have restarted Safari, cleared the cache, reset Safari and restarted the computer. Still slow. Any idea why?