I moved my 1 year old 24" iMac (new 10/18/07, still under warranty for 3 weeks) from the 2nd floor loft to the newly finished basement craft room. Prior we always used wireless on the iMac, now going to the basement I was concerned with performance so decided to go wired. We have a 2 year old Apple wireless airport (b/g, not n). My home was wired with cat 5e for phone/other, so I put a d-link gigabit 5 port switch in the basement, added the ethernet ends, and ran cat 5e to the craft room and newly finished Home Theatre room (prior to drywall). Now, I have a wired network thru the home, and wireless for our iTouch access. Strange thing, the iMac is faster at loading web pages via wireless than hard wired, by a lot. I thought there might be something weird with the gigabit 5 port switch, so from work I borrowed a 100' ethernet cable and directly wired it from the airport to the iMac, still same slow loading. It's like the connection is trying to find the requested server (a 3-5 second lag), then once it's found the page(s) do load quite fast. In the basement, the wireless connection downstairs is sometimes just 2 bars, sometimes drops, not exactly reliable. Anyway, could there be some issue with the iMac internal ethernet card that is causing this to act up?? Short of me making an Apple Store Genius appointment what else diagnostic/troubleshooting should I do? I'd really like to make the hard wired connection work, and don't want to get some external antenna for the 2 year old router nor do I want to get a new one yet. I should say that I'm using the hard wired in other rooms and those computers (a MacBook and a Dell D620 laptop) are very fast hardwired.