Internet works on Win7, but not Lion

Okay, I've tried everything I can think of and I have no idea what to do next, as I've never really been a "networking" guy. I have a mid-2010, 15" MBP. I recently installed Win7 through Boot Camp, though this problem has existed since before that. Whenever I try to access the Internet while on the OSX partition, it is possible to usually load one or maybe two pages. After that, my connection comes to a virtual standstill and no other pages will load. If I am in Chrome, the browser keeps displaying "Sending request..." until it times out. It doesn't matter which brower I use though, all have the same problem. All the while, my Mac says that I have a solid connection. If I try to load something in more than one tab at once, then the connection stops almost immediately. Even if I have an ethernet cable connected and Wi-Fi disabled, the problem still persists.
Now for the strange part. If I switch over to the Win7 partition and try to access the Internet, it works fine. I can open as many things in as many tabs as I want and it'll still work great. I've never had any problems with it while running Windows, so I'm guessing that it's something goofy in the settings on the Mac side, but for the life of me I can't find out where. Here are some of the things that I've tried doing:
     - I've tried changing the DNS settings and possibly using some other services (i.e. OpenDNS, Google DNS, etc.) but it doesn't help. I don't think it's      necessarily a DNS problem at this point, as I've tried directly going to an address (http://74.125.224.82/ instead of google.com, for example) and I have the      same problem.
     - On a recommendation, I've tried deleting /Library/Preferences/SystemConfiguration/preferences.plist to try and reset my network settings. Nothing.
     - I've deleted all wireless networks and tried re-entering the information for my Wi-Fi connection, but still get the same problem.
     - I've reset my cable modem (NetGear CG3000D) more time than I can count.
And like I said, since I'm not a networking guy I can't think of anything else to try and fix it off the top of my head. I've been getting ping times of ~35ms, which seems pretty reasonable. A small amount of packet loss (~14%) occurs every now and then, but for the most part it's solid.
So does anyone out there have any ideas what could be wrong? I can provide additional information if needed. Any and all help is greatly appreciated!

Are you connecting the AirPort Extreme to a simple modem (it will only have one ethernet port), or is the device a gateway (combination modem/router with 3-4 ethernet ports)?

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Quote from: Wingu on 20-May-13, 08:15:26
Thank you for your reply.
I think I've got it sorted now. I tried another network cable and it works now.
It's weird however since the cable I've used for about a month now works with my old computer (Win7) but not with my new computer.
Gonna go to an electronic store later and see if it will make any difference if I buy a new cable.
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