Slow Wireless Link Speed Dell Inspiron 14z (5423)

Hi all

Just recieved the above laptop from Dell Outlet

First of all I have a dead pixel right in the middle of the screen - will be taking this up with Dell as its really off putting especially on brand new laptop.

My second issue is with wireless - did have problems initially with wireless disconnects and genrally slow speeds

Im not entirely sure but removing Mcafee seemed to help with the disconnects at least - load of rubbish imo

Now my only other major issue is with wireless speeds on the 1703 card

I seem to max out at about 45mb on all broadband speed tests - while on another laptop I get the full speeds of 80mb on the same server at the same location

Im only getting a link speed of 72Mbps in the networking tab of Task Manager and this does seem rather slow - the other laptop gets 450Mbps (better wireless card - to go with my Asus N66U Router)

Anyway my thought process is that the 1703 wireless card is not up to much in the inspiron 14z- I understand that the 1703 card is wireless and bluetooth - with I think 1 antenna for bluetooth and one for wireless connected to the wireless card.

Does anybody know if this is correct???

Now I dont use bluetooth much if at all - so does it make sense to buy just a wireless card and connect the two antennas to the card and therefore losing bluetooth connectivity but gaining better wireless connection???

Any thoughts or advice would be greatly appreciated .........any wireless card recommendations??

I think I have an Intel Centrino WiFi Ultimate N 6300 in the other laptop

Thanks all