[RT-AC5300] Expected wireless throughput?

[feihtthief]

Hi. I've got a RT-AC5300. I'm trying to find out if my unit is a dud or if I'm just reading the numbers wrong.

To avoid any other overlap with wireless devices I've narrowed my testing down to the following devices:
A laptop (Asus G751JY), a small linux box with gigabit ethernet, and the RT-AC5300.

I'm using iperf to test between the Laptop and the linux box. (Various Windows sizes, default, 64k, 1M)
Direct crossover from laptop to linux box gives near perfect gigabit as is expected.
Ethernet from laptop to router to linux box (via ethernet) gives results that I find to my satisfaction (850-920 Mbits/s)
Wireless to router to linux box (via ethernet) gives results that I find dismal. These are all at a range of less than 2m:

• 2g: (4-6 Mbits/s)
• 5g-1: (20-90 Mbits/s)
• 5g-2: (65-175 Mbits/s)

Now from what I understand these values are no where near what I should be expecting at that range.
Moving the router further just gives even worse results.

Things I've tried so far:

• Adjusting the antennas to various positions, flat, 45 degrees & 90 degrees (90 degree gives the best results listed above)
• Changing channels, some give slightly better, some give slightly poorer results, but all in the same ballpark.
• Changing the firmware to Asus-Merlin. Various versions, always doing the factory reset routine after an upgrade. No change in performance
• Turning off various combinations of Antennas
• Setting all SSIDs to the same name, different SSIDs for 5G and 2G, different SSIDs for each antenna.
• Re-shuffling the antennas around on the unit
• Turning off everything that prevents NAT acceleration

I've been scouring the web for a magic bullet solution, and am at my wits end.

I'm trying to replace a 802.11n Time Capsule (2nd generation), but I can't even get the same coverage as it does.

Has anyone had a similar experience?

 

[Trentors]

If your laptop only has 1x1 wifi then this expected. Unfortunately. I experience about 3 or 2 times your max speed 5g-2 when using either 3x3 or 2x2 clients.

The performance of the router cannot fix a slow client.

 

[feihtthief]

Wireless card in the laptop is Intel Dual Band Wireless-AC 7260.
Via the old Time Capsule it does 50-80 Mbits/s (Through a wall and at distance of about 7-8m)

 

[Trentors]

Have you checked other devices? On my phone I get 300+Mbps (connection maxed out) on speedtest with this router.

 

[feihtthief]

Just tried with an IPhone 6S Plus in the same room.

5G-2: 350 - 450 Mbits/s
5G-1: 300 - 400 Mbits/s
2G: 1 - 3 Mbit/s, long gaps on no transfer with zero/s

 

[Trentors]

Just tried with an IPhone 6S Plus in the same room.

5G-2: 350 - 450 Mbits/s
5G-1: 300 - 400 Mbits/s
2G: 1 - 3 Mbit/s, long gaps on no transfer with zero/s

Well that seems fine then. The router is likely not the culprit then.