I used to have this speed and limited problem with my Sony Vaio Pro 13 equipped with Intel Dual Band 7260N until about a month ago. After some Windows updates, driver updates for chipset, etc. and the 16.6.0.8, my Vaio Pro's connection is now rock stable and I can even transfer 20 GB of data wirelessly and it never slows down at all. Both 5 GHz band and 2.4 GHz band never disconnect nor gets stuck at 6 Mbps even after 2 days of continuous connection. I'm currently on the 16.8.0.6, 16.8 official Dell drivers and this driver is just as stable as 16.6.0.8 while giving a bit higher throughput. I see this problem more commonly on people who replaced the card themselves rather than OEM preinstalled 7260 cards. Intel probably knows that the issue doesn't affect those with the 7260 OEM certified laptop models that much compared to those who replaced their cards since Intel designed their 7260 series cards with Haswell and OEM collaboration after all. Well, people who is writing stuff here are mostly users who replaced their cards with 7260 and then complain that they have problems. Intel doesn't give support to those people unfortunately.
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