Any wireless experts?

Hmm might have fixed this, might not. I thought afterwards I wonder if theres any clashes with local routers - checked and I had 4 local routers on channel 6 and 3 on channel 11. My router had defaulted on AUTO to channel 6 - I forced it to channel 3 and it seems to be much happier now.

I would have thought the code between router and card might have been a bit better when on AUTO - thinking that the traffic on 6 was quite heavy and maybe trying another channel but it seemed happy to just sit on 6 and get the contention.
 
How on earth can I get 78Mbps connection when the 2 products are less than 1 inch from each other - the reason I purchased them was because they were both rated at 270Mbps - do they simply not work?
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Nail on head. They don't work. The quoted rates aren't TCP/IP rates, they're physical data rates. A bunch of the stuff transmitted isn't your data - it's the preamble, the error correction and detection data. A lot of this stuff takes *time* rather than cycles, so this effect actually worsens the faster the data rate gets.

802.11b (11Mbps) gives a theoretical max of about 5.6Mbps

802.11g (54Mbps) gives a theoretical max of about 27.3Mbps.

It wouldn't surprise me if the theoretical max of 270Mbps is around 100Mbps.
 
One thing i'd add to this is that i've never been fond of the netgear connection software.

I've always just let the new hardware wizard just pull the driver only off the install disk, then use the windows wireless zero config.

Also with the channels, 11, 6 and 1 have no crossover of frequency, so if you are trying other channels try 1 next maybe.
 
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