Factory default reset, RT-N66U people. I ran (yet another) test here on my RT-N66U, had no issue connecting to wifi through two walls (the hardest scenario I can reproduce here) and running an iperf performance test through the wifi connection.
The RT-N66U is becoming too much of a time sink at this point. That's why I'm leaving it at the same wifi drivers used by Asus. People who aren't satisfied by it (its performance is still better than the vast majority of similarly-priced routers out there), feel free to switch firmware or switch router. This has reached the point where I'm am getting seriously annoyed. This is what you get out of the hardware and closed-source drivers from Asus. Accept it - it's not in my control, for the hundredth time.
Comparing this with whatever result you get out of Tomato or DD-WRT is meaningless. Neither of these are of any use to people having a high speed connection - you need HW acceleration for that. And the SDK5.100 driver is of no use to PPPoE users with a fast connection, since HW acceleration was only implemented with SDK 5.110 (which is broken with many wireless adapters - read the forums if you need to see the feedback from RT-N66U owners at the time). So if we sum things up:
- driver 5.100 is useless to PPPoE users
- driver 5.110 is useless to certain wireless client manufacturers
- driver 6.30 is useless to people wanting out-of-the-park range and coverage
That means there's not a single driver that suits everyone. And no, I'm not going to spend hours every release making one different build for every single scenario out there. The source code is on my Github repo - if you want it that badly, compile your own flavour yourself.
The December driver (from 374.43) versus June driver (from 376_1071) shows NO CONCLUSIVE evidence that one is better. I compiled 6 different test firmwares on one night, had a bunch of people try them out. The end result: some people got better performance out of the old. Some got better performance out of the new. And in my case? I saw no noteworthy difference at all (2-3 dBm is not something I consider noteworthy, it's something I consider random noise).
I even had one tester who reported horrible performance on one night, and great performance a night or two later with a different FW build, with the exact same driver (he didn't know at the time I had used the same driver in the two builds he tried).
So for one final time, RT-N66U owners: reset to factory default setting, delete and recreate the wireless profile on your client, set an optimum (free of interference) channel, keep the 2.4 GHz on 20 Mhz and the 5 GHz on 40 MHz, and look at the results: this is as good as you will get out of this router right now.
I will simply ignore any further complains concerning RT-N66U wifi performance. I'm sorry it had to reach a point where I have to go in ranting mode, but this is how annoyed I am with this whole situation, and I'd rather make sure that everyone is clear on this situation before I just decide to throw it all away because this reaches a point where this hobby is no longer any fun at all for me.