This doesn't make sense. I have had the Netgear C6300BD for quite a while now (maybe a year or so) and was consistently getting 300 down prior to the issues I have experienced in the last two months. Why would that all of the sudden change two months ago? Netgear's own datasheet on the 8x4 is that it supports up to 340 Mbps. The only way this makes sense is that you are limiting 3.0 devices to force an upgrade to 3.1?
Cox is right in this case. For various reasons you never want to run a DOCSIS modem at more than about 50% of its maximum speed. So an 8x4 modem with an an absolute maximum of 340 Mbps is realistically good for up to 170 Mbps download speed. Maybe that modem slipped through the cracks before but you really do want at least a 16 channel modem for 300 Mbps download. Keeping up with the latest modem technology is always a good idea. Where the problem arises is when the support tech tries to blame a brand new top of the line modem for Cox network issues.
Wish I got this kind of answer from Cox! I'm looking at getting my own modem now anyways, so I can at least stop paying the rental fees.
