R6400v2 Connection speed

[WmTasker]

I upgraded my internet speed from 100mbps to 400mbps.  I installed the new modem that came from spectrum and restarted all my equipment.  When I do a speed test wired to the netgear router, I only get a speed on 170mbps.  Spectrum had me hook directly up to the modem and do a speed test and the speed was 420mbps.  Why am I loosing so much speed after connecting through the router?  Firmware is updated, I enabled QoS and WMM, I have cycled through resetting all the equipment a few times.  I was thinking about doing a factory reset on the netgear router but havent done it yet.  Any help would be great.  Thanks

[plemans]

QoS isn't recommend with speeds >250mbps. 

here's what I'd do and in order of how I'd do it.

1. Disable both QoS and any other traffic monitoring you have enabled such as armor, circle, traftic monitoring, qos. Once those are disabled, reboot the router. Rerun you test. 

2. Factory reset the router. I've seen several instances where qos settings were retained. A simple reset and manual reinstall usually fixes these. 

What firmware is on your router?

What modem modem did they install?

[Dragonfirexz95]

It's their crappy firmware. I had the exact same problem. Upgraded to 500 mbps down from Mediacom and everything is tested successfully without the router at 500 mbps down. Plug in AC1750 with the newest firmware and it slows my speeds down to 200 mbps. Changed out cables and still the same issue.

I just downgraded my firmware from 1.0.4.84 to 1.0.2.52 and my speeds are now over 400 mbps down. Netgear, this is my last router I'll be buying from you. Apparently, this firmware issue is something that goes all the way back to 2017. If you can't fix it, I'm done with your garbage gear.

[WmTasker]

I disabled both the QoS and the traffic monitoring. I am going to try and do a factory reset if this doesn't help in the morning. 

Firmware Version V1.0.4.84_10.0.58

Moden is E31T2V1

**I just tested and I am connecting at around 200mbps which is up from 70ish I was at over the wifi.  I was getting about 170-180 when I am wired and that is also about 200mbps now.

[WmTasker]

Where can I find the older firmware? if it comes to that for me

[antinode]

> Where can I find the older firmware? [...]

   Visit http://netgear.com/support , put in your model number, and look
for Downloads.  (For older versions, under Firmware and Software
Downloads, look for "View Previous Versions".)  Find the kit(s).
Download the kit(s) you want.  Read the "Release Notes" file for
instructions.

[Dragonfirexz95]

https://www.netgear.com/support/product/R6700v3#download

Click on View Previous Versions.

I confirmed it was the firmware. Factory reset the router after downgrading firmware, confirmed it was working at 500 mbps, then upgrade to the newest firmware and back down to 200 mbps. Downgraded once again to version 1.0.2.52 firmware and back to 500 mbps.

[WmTasker]

That’s a different router than the one I’m using. What version did you down grade to?

[Dragonfirexz95]

That should be the same one. Mine says R6400v2 in the top left as well, but they give you the R6700v3 firmware. I was confused at first as well, but the numbers match up for me.

https://i.imgur.com/eLquhm3.png

You can see my current firmware that works in that screenshot and the one it's trying to upgrade to.

[WmTasker]

Ok. It hard to see the version. It’s to fuzzy when I try to zoom in on the pic.

[Dragonfirexz95]

Sorry, I'm using an ultrawide 3440x1440 monitor. Lol

Here's a smaller picture. The version I'm using is 1.0.2.52 underlined in red.

https://i.imgur.com/i36LraB.png

The newest version is 1.0.4.84. That one doesn't work for me and gives me slow download speeds, and a few of the prior firmware versions may not work correctly, either.

[WmTasker]

I’m always worried that I’m going to turn my router into a paper weight when I mess with the firmware

[plemans]

Patience and a hardwired connection is the key to not bricking routers with firmware in my experience. Sometimes it takes a bit longer than you think. 

[Mikekazz]

Thank you for sharing this, I have been having the slow issue as well and when i went back to V1.0.2.52_1.0.39 it is back to normal.

[WmTasker]

It worked for me also. I still don’t think my uploads are as high as they should be but my downloads are blazing fast.