edit- I'm leaving this post intact, but read my update at the bottom. Problem appears to NOT be the RT-AC66U:
So I thought I was pretty much free from all the problems most seem to have with the RT-AC66U. For the last week or 2, I have been convinced that my DSL provider was not providing me with the speed I pay for (just running tests at speedtest.net) . Then I rebooted my RT-AC66U. Wow. There are the fast Ping results, Download, and Upload speeds I used to get with my old DIR-655!
With RT-AC66U, ping will go from 22ms, to 135ms, to 500-800ms. Have to reboot the router to restore the faster result. Download stays useful. I used to ALWAYS get 3mbps (maximum available here), but with RT-AC66U, looking at 1.1 - 3.1mbps download speeds. Unpredictable. To restore speed one must reboot. Upload speed, however, is the real killer. After reboot I will have the 650kbps I pay for. Within a few minutes, 100kbps - 400kbps. For several days I was getting 10kbps - 70kbps. That's dial-up speed.
Thought it was my ISP until the reboot. Wish I had caught this earlier. Too late to return now.
Using .354 Asus firmware. Have tried changing various settings too numerous to mention. The one consistent factor so far is only rebooting the router will restore the fastest settings. It seems to gradually go downhill from there until another reboot.
UPDATE:
I should delete this thread as THE RT-AC66U SEEMS NOT TO BE THE PROBLEM. Download Master seems to be the cause. I had read someone recommended not to install Download Master, but Asus Download Master is one of the primary reasons I purchased the router. Even though Download Master was not uploading / downloading anything, it seems to have been the source of the problem. I did not uninstall Download Master, I just disabled it. Thus far that has completely resolved the issue for me. Lightning fast again!
Disable Asus Download Master and PROBLEM SOLVED.
I guess I will just enable and use Download Master during times when no one is using the network, late at night, or when we're gone, which is probably the only times it is useful anyway.
So I thought I was pretty much free from all the problems most seem to have with the RT-AC66U. For the last week or 2, I have been convinced that my DSL provider was not providing me with the speed I pay for (just running tests at speedtest.net) . Then I rebooted my RT-AC66U. Wow. There are the fast Ping results, Download, and Upload speeds I used to get with my old DIR-655!
With RT-AC66U, ping will go from 22ms, to 135ms, to 500-800ms. Have to reboot the router to restore the faster result. Download stays useful. I used to ALWAYS get 3mbps (maximum available here), but with RT-AC66U, looking at 1.1 - 3.1mbps download speeds. Unpredictable. To restore speed one must reboot. Upload speed, however, is the real killer. After reboot I will have the 650kbps I pay for. Within a few minutes, 100kbps - 400kbps. For several days I was getting 10kbps - 70kbps. That's dial-up speed.
Thought it was my ISP until the reboot. Wish I had caught this earlier. Too late to return now.
Using .354 Asus firmware. Have tried changing various settings too numerous to mention. The one consistent factor so far is only rebooting the router will restore the fastest settings. It seems to gradually go downhill from there until another reboot.
UPDATE:
I should delete this thread as THE RT-AC66U SEEMS NOT TO BE THE PROBLEM. Download Master seems to be the cause. I had read someone recommended not to install Download Master, but Asus Download Master is one of the primary reasons I purchased the router. Even though Download Master was not uploading / downloading anything, it seems to have been the source of the problem. I did not uninstall Download Master, I just disabled it. Thus far that has completely resolved the issue for me. Lightning fast again!
Disable Asus Download Master and PROBLEM SOLVED.
I guess I will just enable and use Download Master during times when no one is using the network, late at night, or when we're gone, which is probably the only times it is useful anyway.