RT-AC68U slow wifi

Post new topic   Reply to topic    DD-WRT Forum Forum Index -> Broadcom SoC based Hardware
Author Message
attfuzz
DD-WRT Novice


Joined: 15 Sep 2020
Posts: 2

PostPosted: Tue Sep 15, 2020 23:17    Post subject: Slow speeds Reply with quote
So, Iv'e just started using dd-wrt again. Previous router was a Linksys that worked great till you could no longer log into it and it is not supported by dd-wrt. So, went with an Asus RT-AC68U running the 44340 firmware. My issue is with the speeds, they are almost cut in half. With the Linksys on 1GB service, speeds were around 940MB and when on 500MB service, speeds were around 550MB down, our ISP over provisions by 10%, except for the GB speed. Iv'e tried two other dd-wrt firmwares with the same results. Is this all this router is capable of, or am I missing a setting somewhere? Haven't tried the SFE setting yet. Is there a router that will handle the GB speeds running dd-wrt? Model, make, etc. Sorry for so may questions. Thanks.
Edit: did try the SFE setting and it does help, anything wrong with leaving this enabled?
Edit again: now with SFE enabled, wireless speeds are horrible, guess I'll keep messing with it.
Sponsor
msoengineer
DD-WRT Guru


Joined: 21 Jan 2017
Posts: 1365
Location: Illinois Moderator

PostPosted: Wed Sep 16, 2020 0:59    Post subject: Reply with quote
There is nothing wrong with running SFE.

Your wifi settings are a result of something else being off in the wifi settings and not SFE.

The RT-AC68U was normally good to about 750mbps on stock firmware. With SFE turned on you should be able to hit that Wan-Lan.

In terms of wifi- 2.4ghz will be a crapshoot and you will top out around 90mbps under HT40mode with a client running HT40mode too.

5ghz performance should be around 250mbps max if all your settings are right.

https://www.smallnetbuilder.com/wireless/wireless-reviews/32239-ac1900-first-look-netgear-r7000-a-asus-rt-ac68u?showall=&start=2

_________________
FORUM RULES

TIPS/TRICKS: Best QCA Wifi Settings | Latency tricks | QoS Port priority | NEVER USE MU-MIMO |
Why to NOT use MU-MIMO | Max Wifi Pwr by Country | Linux Wifi Pwr | AC MCS & AX MCS | QCA 5Ghz chnls to use | WIFI Freq WIKI | TFTP R7800 | Don't buy AX | IPERF3 How-To

[R9000]44565 nightly (Main Router)
[EA8500]43192 nightly (2xOffsite)
[R7800]napping
[WDR3600]BS 42567 (Offsite)
[A7v5]BS 43038 (Offsite+spare napping)
attfuzz
DD-WRT Novice


Joined: 15 Sep 2020
Posts: 2

PostPosted: Wed Sep 23, 2020 14:37    Post subject: Getting the most out of your RT-AC68U Reply with quote
After some research and playing with some settings, here's what worked for me on a 500 MB download and 125 MB upload from our ISP. Our ISP also over provisions by 10%. This is on the: Firmware: DD-WRT v3.0-r44340 std (09/10/20).

Under Setup, Basic Setup: Set Shortcut Forwarding Engine (SFE) to Enable. This is a must!

Under Wireless, Basic Settings, wl0 2.4 GHz: Wireless Channel: Select a channel that is clean with no overlapping signals from other AP's in the area. Mine was channel 11. Can be "seen" using the WiFi Analyzer App on a phone.

Channel Width: 20 MHz
TurboQAM: Enable
Explicit Beamforming: Enable
Implicit Beamforming: Enable

wl1 5 GHz
Wireless Channel: A good clean channel with no overlapping signals from other AP's around you. Mine is channel 100.
Channel Width: VHT 80
Explicit Beamforming: Enable
Implicit Beamforming: Enable

Wireless Security: WPA2-PSK (AES) on both 2.4 and 5 GHz.

WL0 Advanced and WL1 Advanced
CTS Protection Mode: Disabled
WMM Support: Enabled

NAT/QoS, UPnP, UPnP Service: Enable
NAT/QoS, QoS, Start QoS: Disable

Everyting else is at the defaults. On 2.4 GHz I get around 80 MB up and down. On 5 Ghz I get around 340 MB down and 136 MB up. On a wired connection it's 550 MB down and 136 MB up.
Display posts from previous:    Page 1 of 1
Post new topic   Reply to topic    DD-WRT Forum Forum Index -> Broadcom SoC based Hardware All times are GMT

Navigation

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum