s_Fanous
Occasional Visitor
Hi all,
I suppose that sort of issue has been asked many times before but I'm trying to diagnose and fix what I consider to be abysmal 2.4GHz band performance on my RT-AC68U.
My setup
Problem
Neither my iPhone nor my laptop can get over 30Mbps throughput on the 2.4GHz band even when I'm less than 1 foot away from my router.
Tests
My initial research indicates that the iPhone 6 supports 802.11ac including 256-QAM with 1 spatial stream for a theoretical maximum throughput of 200Mbps on the 2.4GHz band while the Intel 7265 card supports 802.11ac including 256-QAM with 2 spatial streams for a theoretical maximum throughput of 400Mbps on the 2.4GHz band.
Changes tried
Any recommendations on what I can look to do next to fix this issue?
TIA
I suppose that sort of issue has been asked many times before but I'm trying to diagnose and fix what I consider to be abysmal 2.4GHz band performance on my RT-AC68U.
My setup
- RT-AC68U running Merlin 378.56_2
- iPhone 6
- Lenovo T450 using OEM Intel Dual Band Wireless-AC 7265
- Desktop connected by CAT5e ethernet (1Gbps NIC)


Problem
Neither my iPhone nor my laptop can get over 30Mbps throughput on the 2.4GHz band even when I'm less than 1 foot away from my router.
Tests
- speedtest.net from both iPhone and laptop
- iperf3 between iPhone and Desktop as well as between Lenovo and Desktop
My initial research indicates that the iPhone 6 supports 802.11ac including 256-QAM with 1 spatial stream for a theoretical maximum throughput of 200Mbps on the 2.4GHz band while the Intel 7265 card supports 802.11ac including 256-QAM with 2 spatial streams for a theoretical maximum throughput of 400Mbps on the 2.4GHz band.
Changes tried
- Wireless Mode -> Auto and N Only. I don't have any legacy 802.11a/b/g devices at home.
- Control channel -> 1, 6, 11, and Auto (I've settled on manually selecting 6 as it's the least used in my neighbourhood with only about 2-3 other networks using that channel. All networks in my area are using 1 of the 3 recommended channels except for 1 network which is using channel #3.
- Channel bandwidth -> 20, 40, and 20/40
Any recommendations on what I can look to do next to fix this issue?
TIA