Anyone else here still using DIR-850L router with 500/800Mbps turbo?

I can't get past 305Mbps on speedtest, I tried multiple speedtest sites, downloaded few stuffs. But the max download speed I get is only 39mb/s.

My connection is wired, Cat6 ethernet cab.

This is a gigabit router. It's supposed to be able to achieve gigabit speed on wired, but I don't think so anymore. I need confirmation on DIR-850L turboe'd user before I bin this thing.

Since you're already using cat7, it must not be the cable then. How long you've been turboed for?

I'm on 800mbps plan, max upload speed i'm getting.. 203-205mbps.
I was thinking of calling unifi, but I'm really not in the mood to hear their bs excuses now.


This post has been edited by insidemycloset: Nov 2 2018, 12:51 PM

The first time I got upgraded from 50mbps to 100mbps, I couldn't get past 90Mbps on speed test. Then I found out that my cable was Cat5.. I switched to Cat5e cable and I managed to get full speed at 106mbps. I bought new cat6 cable just for the turbo upgrade.

have u upgraded your router already? any difference?

Yep I know my upload speed is fine, but I can't get past 302Mbps download speed on speed test on cat6 wired.

I see, I might get an asus too.

I'm already looking for a new one right now. I just wanted confirmation from DIR-850L turbo'ed users before I blindly buy a new one and turns out the problem is on unifi's end.


But damn. these router companies, advertising their 'gigabit' routers that can't even achieve 800mbps on wired connection .

wait what?

Yeah the PC i'm testing on is quite old, it's an i7 4770k . But it's water cooled inside a mid tower case with 3 front intakes and 3 exhaust fans i'm sure it's not that hot inside if that's what you meant by heat.

I have no idea what microcode issue is, what is it?

like you said, I went to safemode with network, the upload speed is always 204mbps.

ookla chrome 88mbps
tmspeedtest chrome 301mbps

ookla chromium 90mbps,
tmspeedtest chromium 302mbps

ookla opera 87mbps
tmspeedtest opera 302mbps

ALSO I tested my Cat5e cable too, switching ethernet ports with my Cat6 cable, same results.

I did a little bit of googlin and went through regedit, cpu-z validator. I don't have spectre mitigation enabled, It's not even patched cuz I never update my windows .

should I just give up and call TM to send their technician over?

Heres an update. I only have one Cat6 cable connected from router to PC and not from ONU to router.

Iv just realized that Im still using the Cat5e cable that comes with the ONU. The light grey colored cable with yellow head sleeve, maybe its a very low quality cable .

Tomorrow Im gonna buy a short 1M Cat6 or Cat7 cable and test it out, hopefully thatll fix the problem. If that doesnt wok, ill contact TM.

Thanks for letting me know.

I'm having a problem with my 800mbps, My download speedtests will never go above 340Mbps but the upload speed is fine, always around 204Mbps. 2 of My PCs are wired with Cat6 to Router..

But I forgot that my ONU to Router is still connected with Cat5e that came with the Unifi ONU. So I ordered a Ugreen cat6 cable from lazada yesterday, waiting for it to arrive.

sorry for the late reply I was away for a day.

1) Router is DIR-850L, wired LAN. Cables are all Cat6(my Ugreen cat6 cables arrived today.).

2)I tested on both speedtest.net and TM speed test website, on mutiple browsers, without extensions and incognito mode, with browser hardware accleretaion on&off.

I have 3 desktops on Cat6. and all of them are getting the same 340Mbps D/L and 204Mbps U/L.
Yesterday I contacted TM live chat, she reset my port but problem is still there.

But I have another problem too, Only IP that starts with certain numbers gives me 340Mbps download speed. other IPs, barely reaching 200Mbps download.

So I contacted live chat again and now they're gonna send their technical team over because the problem MUST be on their side.

Yes I did, someone told me to do that few pages back. I even scanned for Microcode problem too. Also updated the LAN drivers on all 3 PCs.

2 of the PCs have decent Gigabit PCIe network cards.

I'm 99% sure that the problem is on their side.

Make sure that your LAN cable is "Cat 5E" or higher and not "Cat 5". Because Cat 5 cable only supports up to 100mbps.

Nope QoS is disabled, boxes are empty.

I only used QoS few times before, Back when I was on 30Mbps unifi.

Thanks for all the replies guys, the problem is solved.

TM Technician came earlier, I asked him to reset the router but the speed is still below 350Mbps.

After an hour of testing and failing. He then decided to change the router with a new 850L for RM53 cuz the warranty has expired. I asked for another model of router but that's the only one available.

With the new DIR 850L, Now I'm getting more than 800Mbps on cat6, and it once maxed out at 877Mbps.. since we don't really use wifi in this house, I guess ill be sticking with this one for a lil bit more.