So, I changed ISPs a couple of days ago and ran into a strange problem. I'm hoping someone here can help. Previously, I had 40 Mb download and was hitting that mark or a Mb or two higher (Cat5 ran through the walls). After switching to the new ISP, I have a 100Mb download and actually hitting 128-30Mbs wirelessly. However, if I connect through the Cat5 (again, ran inside the wall) I'm only getting 20Mbs. The same is true for my wife's landline. Now, if I connect a Cat5 directly into the modem, I'm back up to 120+Mbs. Also, another landline in the library runs at 120+Mbs. (just tried it again and I'm not getting even worse speeds through this line—2-3Mbs). Now, it seems obvious the problem is the runs through the walls, especially as they're outside walls and probably dealing with extreme desert heat. But if that is true, then why was the speed cut in half across the Cat5 run in the walls when I switched modems? Is it an issue of too much bandwidth + (possibly) degraded Cat5 cabling = greater resistance? (Runs are no more than 30 yards).