This is a long story, so read it all before you jump in offering help. no need to cover unrelated/already tested ideas. I have a TP link wireless N router - TL-WR941ND V2 i have four wireless N adaptors - two are 150Mb, two are (supposed to be) 300Mb in both directions. The problem is that the 300Mb adaptors are being total dickbags. they run on the Ralink RT2870 chipset. List of problems: 1. No matter what driver i use, they seem to report the upload speed in windows as the connected speed. From the router i can see differently - for example, this. 2. (ties in with 1.) No matter what i do, i cant seem to get a 300Mb upload speed which was why i bought these damn things in the first place. i can get 250-300Mb down, which is fine, but max of 150Mb upload is worthless... i might as well have stayed with my two 150Mb only adaptors if thats all i was going to get. 3. As soon as i install the ralink software (not just 'driver only') all wireless networking breaks on my machine, even for a realtek wifi adaptor. it seems to screw up windows built in wifi system, which it uses for its core features - so i cant disable the windows service and just run this, fyi. This means that if the software had whatever cure i need for 300Mb, i cant use it microsoft and ralink drivers changed nothing, i already tested a third party 300Mb adaptor and it worked fine, already flashed the router to DD-WRT - no change, the problem lies with the adaptors or their drivers. Anyone got any ideas how to fix this?