It's probably because I was using 801.2 b/g wifi clear across the house so the signal was pretty weak, and it would be slower than n (not sure if ps3 does n though), but I have since run some cat5e through the ceiling, so I don't have to rely on wifi at that end of the house.
As Murtle said, I have 1 cable running that gets used by either the ps3 or the tv but not both.
Due to location adsl and fibre are not possible (too far for FTTH and Copper gets stolen within 48 hours of being put up, plot life).
Basically the only internet connection I can get at home is Vodacom, not one of the other service providers works beyond gsm/edge.
I plan to build a decent network and attach all my devices to it but as I would also have to severely constrain internet to most of the devices so as not to end up with horrible monthly bills it's not as simple as just a switch.
I would have to put a proxy/firewall between my lte router and the rest of the network or buy a new router.
Then I would have to disable the wifi on the router (meaning I need another AP).
As I currently have a playstation and 2 computers I would like to attach wired I would need a switch.
So in essence to get my network working on all devices and to be able to block some of the devices I would need the following:
Around 150/300m Cat + plugs
1x pc for proxy/firewall or another router
1 or more access points/range extenders (I estimate for lightning fast wifi through the house I would need 1 AP and 2 extenders, all 3 wired to the same network).
1 switch (8 port minimum, 2xpc's, 1xps3, 3x wifi and internet device).
The question is do I really want to go through all this effort with the heavily limited internet connection I have at home?