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R9000 - only getting 25% WiFi speed on 802.11ad 5GHz
I purchased the router brand new yesterday and upgraded our internet service to 800 mbps, but I am only getting 200 mbps over wifi (I do get 800 mbps with ethernet cable). I have a brand new Dell Pre...
foxbrady, 300.0 Mbps PHY speed explains a lot. schumaku is right, that PHY rate implies 40Mhz channel width, but you should be able to do better?
On Dell PC:
- log in as admin
- computer management / device manager / network adapters
- double click on adapter / click on 'Advanced' tab
- Check these adapter properties:
- channel width for 5 GHz (want auto)
- HT mode (want VHT)
If those settings look OK, sign onto router and verify the 5GHz wireless settings: For "mode" (speed) of 5GHz -- want 'up to 1733', which is 80Mhz channe (other settings reduce channel to 40Mhz and 20 Mhz).
wrote:I purchased the router brand new yesterday and upgraded our internet service to 800 mbps, but I am only getting 200 mbps over wifi (I do get 800 mbps with ethernet cable). I have a brand new Dell Precision 5420 notebook with 32GB RAM and a Dell Wireless 1820 card 802.11ac ... Any ideas what I can try to get the full 800 mbps speed on my laptop wifi?
Well, this Dell 1820 card is a 2*2 card which can handle a best link rate of 866 Mb/s - real-world throughput will be much less. The ~200 Mb/s are about all of it. Even good 3*3 clients don't exceed 300 Mb/s. The router, no much more any router can't make any wonders, even if it does support 3*3 on 160 MHz ... trouble is that the latest clients are using 2*2 on 160 MHz bandwidth (because most notebook makers just install two antennas...$$$ what is sufficient for "average" WLAN client equipment) ... and we're awaiting the real 802.11ac Wave 2 160 MHz mode on 2*2 for the R9000 later. Whatever Inhell wireless card Dell on-site service will install, please let us know.
Hope you are not to much blinded by the marketing lies by the WiFi industry.
Here's a screen shot of my adapter. Notice the 300 mbps speed. Does this speed indicate the max proving your point?
The "Dell Wireless 1820" is the problem. 2x2 MIMO is the limiting factor. I hope "Understanding wifi speeds" at duckware.com/wifi helps explain why...
wrote:Here's a screen shot of my adapter. Notice the 300 mbps speed. Does this speed indicate the max proving your point?
This is the PHY speed, sometimes referred as the link rate. With this signal level, and assuming you are near to the router, and permitting the Dell Wireless 1820 is able to do more, I would expect something around the 800 Mbit/s (like 733...866 Mbit/s). 300 Mbitp/s PHY rate is rare, only variant I can think of is with two streams, 64-QAM@5/6, a 400 ns guard interval, and at 40 MHz bandwidth.
The effective constant data throughput rate is well below, at some 50..55% max.
Are there any advanced property settings for this interface?
foxbrady, 300.0 Mbps PHY speed explains a lot. schumaku is right, that PHY rate implies 40Mhz channel width, but you should be able to do better?
On Dell PC:
- log in as admin
- computer management / device manager / network adapters
- double click on adapter / click on 'Advanced' tab
- Check these adapter properties:
- channel width for 5 GHz (want auto)
- HT mode (want VHT)
If those settings look OK, sign onto router and verify the 5GHz wireless settings: For "mode" (speed) of 5GHz -- want 'up to 1733', which is 80Mhz channe (other settings reduce channel to 40Mhz and 20 Mhz).