| Speed decrease can one expect on WIFI What kind of speed decrease can one expect on WIFI from ethernet?
Just got Ultra 1 and getting speeds over 100 (107, 117 etc…) but always over 100 with ethernet plugged into router to computer. Unplug and switch back to WIFI and speeds drop to 35-45. Not an old router. Set for n only. 5Ghz & 2.4Ghz. Only one computer on network with this results.
Seems like a bigger hit for wifi than should be. Distance from Router plugged into modem is about 5 feet. So distance should not be a contributor.
Thanks for any ideas. |
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| That also depends on your client and router. Since you didn't mention it i'll just throw some numbers out there:
Routers 3x3 on 5Ghz at 40Mhz will net you a max of 450Mbps link rate which boils down to about 214Mbps (Real world). Obviously your PC needs to have a 3x3 5Ghz network card to get this as well.
Let's go with the regular setup of 2x2 on 5Ghz at 40Mhz is a max of 300Mbps or about 120Mbps in the real world. So 35-45 sounds bad but without specifics it's hard to know why.
List your router and wireless card to get more answers. |
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| Yes I should have included this
Apple iMac, 2 years old. Apple Time Capsule 2 tears old. |
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| reply to mozart11
said by mozart11:WIFI and speeds drop to 35-45.
Seems like a bigger hit for wifi than should be. Hey, I only get 20 Mbps on WiFi. |
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 Miruki
join:2007-08-08
Brooklyn, NY | reply to mozart11
use different SSID for 5ghz... |
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| reply to mozart11
What is the model number of the router?
Your computer should support at 300Mbps via N. I have an old Macbook, and it connects at 300Mbps each way, and I am able to get above 100Mbps down on the speed tests. |
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| It the A1302 1TB. And to the reply from Miruki, I do have different SSID for the 2.4 and 5 ghz sides. And I have tried a different Time Capsule also same result. Latest firmware & software for everything. I just ran these speed tests on the iMac. WIFI got higher than ever, and then ethernet fastest. If I run the same on my MacBook Pro similar results. I know there is a hit on speed, this just seems extreme loss of speed. But thats just a guess on my part. Thanks for your time, same to Miruki |
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WHT
join:2010-03-26
Rosston, TX
kudos:5 | reply to mozart11
said by mozart11:What kind of speed decrease can one expect on WIFI from ethernet?
Just got Ultra 1 and getting speeds over 100 (107, 117 etc…) but always over 100 with ethernet plugged into router to computer. Unplug and switch back to WIFI and speeds drop to 35-45.
Because a wired connection has a separate pair for upstream and downstream data. Wireless has only has to share that, so a wireless connection will be half the speed in any given direction, then you have to add in the wireless overhead.
So...100 Mbps wired and 35 to 45 Mbps wireless is consistent. Though I would expect closer to 40 to 45 Mbps, so a tad on the slow side depending on path gain and interference. |
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| Wow - that makes perfect sense. And something I would never have thought of. Even if not doing any uploading?
Thanks so much. I can stop think bad hardware and swapping stuff out all over. LOL
Thanks WHT |
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 ThinkdiffPremium,MVM
join:2001-08-07
Bronx, NY
kudos:7 | reply to WHT
said by WHT:Because a wired connection has a separate pair for upstream and downstream data. Wireless has only has to share that, so a wireless connection will be half the speed in any given direction, then you have to add in the wireless overhead.
So...100 Mbps wired and 35 to 45 Mbps wireless is consistent. Though I would expect closer to 40 to 45 Mbps, so a tad on the slow side depending on path gain and interference.
The first half of your post is true, 802.11(b,g,n,ac) are half-duplex, the second half of your post makes absolutely no sense.
The link speed of 802.11n should be ~300Mbps if everything is working properly. Going by the half-duplex argument, that would be 150Mbps in one direction - even accounting for some overhead, that's still better than a 100Mbps Ultra connection. It's not half of the cable modem connection speed.
FWIW, I get very close to 100Mbps on my 300Mbps 802.11n network.
mozart11  : Can you try holding down the option key while clicking on the Airport icon in the menu bar. It should list your current link speed between the iMac and the time capsule. Is it less than 300Mbps?
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University of Southern California - Fight On! |
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| Transmit rate says 243 |
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3 edits | reply to mozart11
On a older N laptop with a 4965agn. I get the max down and up close to my netgear r6300v2. 119/38.
On the client make sure you set the following:
- fat intolerant channel disable (this will force 20 MHz if enabled if any stations have this set on.
- channel auto (I have settings for 20 or auto)
- rts-cts enabled
- wmm on
This information was gleaned from smallnetbuilder.com and forum1.netgear.com.
On the router set 20mhz-40mhz coexistence. Choose a channel that's not used by your neighbors with a sniffing tool like inssider. Use wpa-aes. I set download speed to 600Mbps on the a/ac/n channel. edit: Make sure WMM is enabled on the router.
These settings using an appropriate wifi card with a new N/AC router will allow maximum download speed on the 5ghz channel assuming good conditions, minimal interference.
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Ken |
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| reply to mozart11
Set your channel bandwidth in wireless settings to 40 MHz instead of 20 MHz for both bands if you haven't done so already. |
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