ContributionsMost RecentMost LikesSolutionsRe: Only getting max download of 33 Mbps with new DOCSIS 3 Motorola SB6183 16channel modem and Premier upgrade Yeah, I received an email from cox hyping the need to cough up $80.00 for equipment that results in no real improvement in speed! Had I known, I would have just taken my wife out for a nice dinner with that $80.00. I measured my speed on AT&T web site (just google att speed test) before and after the "upgrade". There was virtually no difference. I measure both wired and wireless. My humble advice is, just keep the old equipment until Cox can GUARANTEE a drastic improvement in speed. The equipment itself is capable of over 300Mbps. But of course Cox does not provide anywhere NEAR that.