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RT-AC66U slow speeds with Merlin and Tomato

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jteeen

New Around Here
I just changed over from my local ISP's router to my own, a brand new AC66U. At the time of the changeover I did some tests and got my 100/100 that I'm supposed to. Went to lunch, came back, and now it's pretty much stuck around 20 down / 5 up. I've tried the latest Asus firmware , Merlin, and Tomato.

Tomato runs full speed but doesn't have any AC settings or settings for 5 GHZ. I've cleared the NVram, turned the acceleration toggle on/off with no success.

I have repeatably verified this by going back hardwired to my ISP and I get the 100/100. I even got around 90/90 on my phone which I have a screenshot of prior to the slowdown. I also verified the speeds with torrents and I get the 100/100 or 20/5 depending on direct versus the router. Since Tomato works, and the other two don't, could it be a firmware or setting issue? I have about a week before my return window is up with Amazon.
 
After resetting my ONT (fiber) I was able to get 10MB, 100mbit down over wireless. I then moved the router to another room where it will stay, and now I'm back down to 10-20mbit. Seems like it's some sort of negotiation issue between this firmware and my ONT. Reset didn't work this time around.
 
Try a new cat5e cable between the router and modem.

Sent from my P01M using Tapatalk
 
I tried that and it worked last night, now after a reboot this morning we are back to 10-20 down and 0-5 up.

Sent from my Nexus 5X using Tapatalk
 
Well I picked up a Netgear and it works fine, so it was definitely something with the router. Sent it back to Amazon.

Sent from my Nexus 5X using Tapatalk
 
I had slow speeds on my own AC66u , which is why i stopped using it years back , but i recently got fed up with my ISP's modems they send me for my Fiber , and im running a 500/500 connection , but with the new official bios 3.0.0.4.380_8120 for the RT-AC66U from Asus them selves it runs 500/500 for now, but i guess i will see if it starts to throttle it self down again, if so i might get a tad pissed :p

Now i just need to figure out why even with port forwards open , i'm still not getting green light from my uTorrent......
 

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