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Deco XE75 Pro – Severely Limited Wi-Fi Throughput in AP Mode

Deco XE75 Pro – Severely Limited Wi-Fi Throughput in AP Mode

Deco XE75 Pro – Severely Limited Wi-Fi Throughput in AP Mode
Deco XE75 Pro – Severely Limited Wi-Fi Throughput in AP Mode
2025-07-29 19:49:36
Tags: #Access Point Mode #Wi-Fi Speed
Model: Deco XE75 Pro  
Hardware Version: V3
Firmware Version: 1.2.14 Build 2024122329

Hi all,

 

I’ve been running a Deco XE75 Pro 3-pack in Access Point mode and I’m consistently seeing disappointing wireless throughput across all my devices, even those connected just a few feet away from the main Deco unit, which is hardwired into the network. Can anyone advise if they have seen something similar to this?

 

My Setup
Virgin Hub 3.0 in Router mode, providing DHCP

Deco XE75 Pro 3-pack in AP mode

Main Deco in the lounge is hardwired to a TP-Link TL-SG608E switch

One satellite is wired into a separate TP-Link TL-SG608E, and the other is using wireless backhaul

All testing has taken place within 2–3 metres, clear line of sight of the main Deco in the lounge

 

Testing
I’m using iperf3 on various wireless devices to test against a local server (Intel NUC) connected via Ethernet to the lounge TP-Link TL-SG608E switch, which is also wired to the main Deco. So this is local traffic only, no WAN bottlenecks involved.


Laptop 1 – Intel AX201 Wi-Fi 6

Driver 23.150.0.4 (also tested older versions)

Throughput: 70–90 Mbps

 

Laptop 2 – Realtek RTL8811AU USB 802.11ac

Throughput: ~70 Mbps 

 

Samsung Galaxy S24 Ultra (Wi-Fi 6)

Throughput: ~127 Mbps

 

However, when using hard wired Ethernet to the Deco's LAN port my throughput is ~600 Mbps, so backhaul to the NUC is definitely not the bottleneck

 

I’ve also tested a third laptop and even another USB Wi-Fi dongle, just in case this was NIC-related. All yeilded similarly low results.

 

What I’ve Tried

Disabled roaming, mesh enhancements, and fast handoff features where possible

Disabled all offload settings on Windows NICs (RSC, RSS, ECN, etc.)

Forced 5GHz-only via network adapter settings

Completed all testing on a network at idle.

 

Key Results
Wireless performance consistently caps around 80–90 Mbps, even on Wi-Fi 6 clients.

Wired performance dirctly through the Deco port is excellent

I’ve ruled out client NIC issues by testing multiple devices and adapters

I’ve ruled out environmental interference (as much as possible in a big city) by testing directly in front of the Deco with strong signal

Switching to Router mode seems to cause me major issues with existing devices (Harmony Hub, SofaBaton, Sonos), so I’m limited to using AP mode

 

These Deco units are only a few weeks old, and I was really hoping for a step up in Wi-Fi performance. But right now I’m getting results that don’t feel remotely close to what the hardware should be capable of.

 

Ive trawled through lots of forums (here and all the other usual suspects) but cant seem to find any issues that match my particular setup.

 

Happy to provide logs, further testing, or anything else that might shed light on this.

 

Thanks in advance. G

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#1
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4 Reply
Re:Deco XE75 Pro – Severely Limited Wi-Fi Throughput in AP Mode
2025-07-30 06:41:32

  @Grindlebeard 

Hi, thank you very much for the feedback.

May I know how much of your internet bandwidth?

 

I'd like to follow up on your case via email and ask the senior engineer for further assistance.

Please check whether you can receive my email later.

 

Thanks a lot.

Best regards.

▶Check What's Currently Going on With Deco ▶Deco BE85 1.2.0 Enhanced Mesh Backhaul Stability and Device Roaming Experience ▶Deco BE65/BE65 Pro 1.2.0 Enhanced Mesh Network Stability and System Security ▶Deco BE75 1.1.0 Added WireGuard VPN, Manual Channel Selection and More Try to leave a Message if urgent help is required.
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#2
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Re:Deco XE75 Pro – Severely Limited Wi-Fi Throughput in AP Mode
2025-07-30 07:22:30

  @Grindlebeard 

 

your gigabit switch is the bottleneck. I dont know why the tplink guy is asking questions but this is your bottleneck. I suggest a 2.5gbs switch to increase your speeds. That is why your seeing 120mbs max that's a gbit. Keep all these multi gbit deco's on a multi gbit switch.

 

Regards,

Travis Mills

3x Xe75 pro HW 2.xxx main deco Be5000 need the dual 2.5gbs ethernet ports.
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#3
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Re:Deco XE75 Pro – Severely Limited Wi-Fi Throughput in AP Mode
2025-07-30 08:03:02

Hi  @David-TP,

 

Thank you for coming back to me.

 

I can confirm that my bandwidth is running at just under 275Mbps.

 

 

 

Regards G.

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#4
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Re:Deco XE75 Pro – Severely Limited Wi-Fi Throughput in AP Mode
2025-07-30 08:28:08

Thanks  @Travis82,

 

Im not convinced this issue is down to the speed of the switch. I’m not expecting more than 940Mbps....the 675Mbps I’m seeing seems reasonable under normal conditions.

 

My setup for testing was as follows;

 

Laptop > Main Deco > TP-TL608E > Intel NUC

 

When i am connecting to the main Deco wirelessly i see the following;

 

C:\iperf3>iperf3 -c 192.168.0.59
Connecting to host 192.168.0.59, port 5201
[  5] local 192.168.0.22 port 33028 connected to 192.168.0.59 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.01   sec  10.8 MBytes  89.4 Mbits/sec
[  5]   1.01-2.01   sec  9.88 MBytes  82.9 Mbits/sec
[  5]   2.01-3.01   sec  9.00 MBytes  75.7 Mbits/sec
[  5]   3.01-4.00   sec  10.4 MBytes  87.1 Mbits/sec
[  5]   4.00-5.01   sec  9.00 MBytes  75.1 Mbits/sec
[  5]   5.01-6.01   sec  9.88 MBytes  83.1 Mbits/sec
[  5]   6.01-7.01   sec  9.25 MBytes  76.9 Mbits/sec
[  5]   7.01-8.01   sec  8.25 MBytes  69.9 Mbits/sec
[  5]   8.01-9.01   sec  8.88 MBytes  73.8 Mbits/sec
[  5]   9.01-10.01  sec  6.12 MBytes  51.5 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.01  sec  91.4 MBytes  76.6 Mbits/sec                  sender
[  5]   0.00-10.01  sec  91.0 MBytes  76.3 Mbits/sec                  receiver

 

However, when i physically connect to one of the ports on the Main Deco i am getting;

 

C:\iperf3>iperf3 -c 192.168.0.59
Connecting to host 192.168.0.59, port 5201
[  5] local 192.168.0.30 port 28183 connected to 192.168.0.59 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.01   sec  77.8 MBytes   644 Mbits/sec
[  5]   1.01-2.01   sec  86.0 MBytes   720 Mbits/sec
[  5]   2.01-3.00   sec  69.0 MBytes   586 Mbits/sec
[  5]   3.00-4.00   sec  82.1 MBytes   688 Mbits/sec
[  5]   4.00-5.01   sec  87.5 MBytes   727 Mbits/sec
[  5]   5.01-6.01   sec  75.2 MBytes   632 Mbits/sec
[  5]   6.01-7.00   sec  78.8 MBytes   668 Mbits/sec
[  5]   7.00-8.01   sec  88.4 MBytes   732 Mbits/sec
[  5]   8.01-9.00   sec  79.2 MBytes   673 Mbits/sec
[  5]   9.00-10.01  sec  82.0 MBytes   683 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.01  sec   806 MBytes   676 Mbits/sec                  sender
[  5]   0.00-10.01  sec   806 MBytes   675 Mbits/sec                  receiver

 

I would expect the wireless connection to be slower, but not by 10x when sitting right in front of the Main Deco. At this stage i would be happy with 300Mbps!

 

Appreciate any other ideas.

 

Regards

 

G

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