I wasn't talking about the ram, but the memory clock generators on the motherboard. On the Th7-II they are two small chips between the first rimm slot and the cpu. Mine start with ics, but the poor overclocking chips start with cyp(i believe). If you have the ics chips, you can pretty much disgard anything I have said about the memory clock chips not letting you hit 133fsb. If you have cyp's, that could be the problem.
Just for reference, I have samsung 16device 256meg rimms on my board. I can't hit 533 (4x133) with my ram, I have to run it at a multiplier of 3. I can boot into windows with the ram at 1066 speeds, the computer is just unstable. It still does not sound like a memory issue though. It would affect more than just your internet.