Cannot stream Netflix in HD..?

[neemo6]

I just replaced my old Linksys wrt54gs b/g router with a newer Linksys e2500 dual band n router. I have Desktop w/ n wifi card, laptop via b/g wireless, wifi printer, nexus 7 tablet, 2 android phones, PS3 wireless in the bedroom, Smart tv wireless, PS4 wired, Xbox One wired, Xbox 360 wired, Dish Network receiver wired. I have cable internet via Comcast with 18mbps/dl and 5mpbs/ul on average. When trying to stream Netflix specifically to the PS3 in the bedroom, it rarely streams in hd, it will switch between 240p and 340p. Same thing if streaming to the smart tv which is about 10 feet from the router will not go into hd streaming. If streaming through the game systems that are wired it has a hard time staying in hd. As it goes in and out of 720p and 340p, never goes into 1080p as some movies are listed as showing. Is there anything I can do to make Hd steaming possible?

 

[firo40]

Get more bandwidth from your isp

 

[neemo6]

18mpbs/dl should be more than enough. Everyone Ive talked to says that is more than plenty.