I would suggest you check the following1) Spectrum interference- As you have mentioned that you kept only 1 Access point and still you didn't succeed in getting the required speed.The interference could be from any other radio emitting source like 2....

I would suggest you check the following1) Spectrum interference- As you have mentioned that you kept only 1 Access point and still you didn't succeed in getting the required speed.The interference could be from any other radio emitting source like 2....