slow speeds with wnda3100v2 and a wndr3400v2

[atsports]

I have a netgear wnda3100v2 and a wndr3400v2. The adapter is located approx 6 feet from the router and runs at 5ghz on channel 153. According to ISSIDER there is no network interferance on the 5ghz band. My pc is the only device I use with the router. Using speedtest.net i get only 24 mbps to portland which is only 50 miles away. My advertised comcast connection is 50mbps down and 10mbps up. When connecting the computer to a wired connection i get twice the speed. I optimized the router settings as best I knew how and changed a few of the advanced adapter settings. My question is about the advanced adapter settings in device manager for the wnda3100v2 adapter. My Connection speed to the router is 300mbps also. Which of the following advanced adapter settings should i possibly change or any advice?

20/40 coexistance
40mhz intolerant
802.11h+d
802.11n preamble
afterburner
antenna diversity
apcompatibility mode
association roam preferance
band preferance
bandwidth capability
bss plcp header
bt -amp
disable bands
fragmentation threshold
ibss 54g protection mode
ibss mode
mixed cell support
priority and vlan
rate (802.11a)
rate (802.11b/g
roam tendency
roaming decision
rts threshold
short GI
Wmm
WZC IBSS CHANNEL NUMBER
Xpress technology

 

[blairemrgn]

Are you running windows 8 pro or windows 8 64-bit? If so, several people have suggested rolling back to a win7 much older version (1.0) and disabling the win8 optional updates, which overwrite and update netgear drivers. Many people have had issues with the newer netgear drivers just being horrendously buggy concerning the WNDA 3100v2. To support this claim, people have even tested with a cleaninstall of Win8 with the drivers, and they still run into that problem. If you do not disable the automatic driver updates, you will probably have the older and working netgear drivers overwritten within 48 hours.

The last working method for juggling the driver and win8 issue led to downloading from this link:
http://wnda310064bit.webs.com/

I haven't gotten around to testing it since I just DLed the drivers myself, partly due to my connection dropping as low as 24 kbps while trying to DL, so I just hopped on my laptop to snag the drivers. Remember to uninstall the provided software versions before installing the older drivers. Another notable fact to keep in mind is that this person installed only the drivers and not the netgear genie application. The built-in windows 8 network manager seemed to function fine with those drivers.

-- working solution from cmoney83 on netgear forums