I have recently bought a new system but the same wireless router doesn't work as it did in my old one. The new system if better in every 3way and is in the exact same spot my old one was. The old one was running at 54Mbps constantly and in the new system it rarely gets up to that and stays there for very long.
It can get down to as slow as 1Mbps then to 2, 5.5, 11, 18, 24, 36 and 48Mbps and doesn't stay the same for long at all unless its on the slower ones.
Im running my WLAN card without the driver because it seems to work better and disconnects less when it has the drivers running. On the old system the driver was never used and I never had a problem.
Fluctuating speed 
Linear Mode
