Slow Wireless and Erratic Transfer Rate

Alright, I just got a new Macbook Pro 15 inch last week because my iBook G4 kicked the bucket... again.
All has been well except for wireless. Any Wifi spot has had horrible transfer rates. The TX Rate goes up and down from 54/54 Mbits/sec to 0/54 MBits/sec over and over. This affects local transfer speeds (horribly slow), download speeds and even makes websites not load the first try.
It isn't the router being bad as I've confirmed the problem on more than one router and this is the only computer with the problem on all routers. An Intel iMac with the same (I think anyway) wireless-n card has no trouble at all either with the TX Rate to the same base station.
I tried booting into Windows (XP Professional SP2) but I can't seem to find any utilities to give me as detailed wifi information as AP Grapher does. It was hard to tell if there was a difference.
So is my wifi card at fault here, or OS X? This is a big issue for me and I can't seem to find any solutions online. Also giving a link to AP Grapher to show the TX Rate (the white line) going nuts.
http://socamx.net/tmp/apgrapher.png

i've got mbp with 10.4.11, that just started SLOWING down madly today..after all the research i see many have it much worse with complete loss of wifi...but this is HORRIBLE
i ran a speed test of IBM laptop side by side with MBP and downstream difference was 3X
HELP!

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As the previous poster suggested do a hard reset by holding in the reset button for at least 30 second then reconfigure the router if needed. You can also try the 30-30-30 reset where by you hold in the reset button for 30 second, then while still holding in the reset button, remove the power and wait 30 seconds, then while still pressing the reset button, reapply the power and wait another 30 seconds then release the reset button and reconfigure the router if needed.
It isn't clear if you are using some kind of broadband modem. If you are not using a broadband modem, have you tried to connect the Ethernet cable that comes from the wall to one of the four networking ports on the back of the router rather than the router's WAN/Internet port? Its possible your building all ready is using a router/hub. If this is the case and your computer gets an IP address from the building's router then log into the router and on the Basic Setup page disable the router's DHCP server to avoid conflicts with the building existing DHCP server.

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In the real world if you have ethernet 10/100/1000 and are using a cat 6 cable then expect no more than 11M/sec
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Clients Connect to N AP's on 5508 and get different Transfer rates than on 4404

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Hi
In my 5508 WLC i have exactly the same problem as you gsutherland
I tried apply this command config 802.11b 11nSupport a-mpdu tx priority all disable
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"802.11b network not disabled"
Why i must turn off b standard ?
Thanks for respons

Slow Wireless LAN in Leopard

All right, I've spent the past 12 hours (on and off, of course) looking through all the threads in here, doing a lot of experimentation, and a bunch of clean installs and whatnots, and I've decided to start a new thread, since in many of the said threads, some people seemed to have similar issues, but the other issues in the same threads seem to be different problems, and it just becomes confusing when you try to trouble shoot something and people are talking about different problems.
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2) Your wireless connection doesn't display problems when connecting to the internet.
3) It is not specifically an 802.11n issue; i.e., the problem can be duplicated when in Mixed b/g only mode and/or using an 802.11g router.
4) It's not a router connection issue; i.e., your wireless connection isn't being dropped, and you are able to find your AP and connect to it without any problems.
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I'd been using the TRENDnet more or less happily for the last couple of months. My iMac and Macbook have been in sync in terms of Leopard versions, so I know things were OK till last night when I first noticed problems. Transferring a large video file from the iMac to the Macbook would start off fine, then really slow down, and finally almost completely halt. Naturally, I blamed 10.5.2.
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PLEASE: if your symptoms are different from what's listed up there, please try to refrain from posting here, unless you are absolutely certain that the issues are related. Thanks.

I'll concur, network streaming since 10.5.X is painful at best and has gotten worse with every dot release. Apple, I've spent thousands of dollars on your equipment in the 13 years I've been using it and this is unacceptable.
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12MB uplink to Internet via Cox Cable --> brand new (yesterday) Airport Extreme (to replace a Linksys WRT 54G, which I had originally suspected was the culprit) 100MB Ethernet to Core 2 (single) Mac Mini. Media lives on a Lacie 500GB RAID1 array connected via Firewire 400. The Mini shares out to a Macbook Core 2 Duo @ 2GhZ, Airport Extreme and an iMac Core 2 Duo @ 2.16GhZ.
Movies stutter and die when streaming to the MacBook or the iMac, regardless of codec. The iTunes application can no longer stream mp3s from my shared library (on the Lacie array) to either of those two machines without constant rebuffering.
I have verified the Lacie array isn't suspect by copying known good (by test play on the Mini) files from it to the Desktop on the Mini and streaming from there. I've verified the MacBook and iMac aren't suspect by copying those same known good files to the Desktop on each and playing from there. I don't have issues opening a connection from one machine to any other on the network, but any sustained connection is an issue, regardless of networking protocol (AFP, SMB) or connection\authentication method (Finder sidebar or "Connect to Server" dialog.)
Apple, you have an obligation to your customers to resolve this. I've been a networking professional for 17 years and setting up the Airport Extreme was far from a challenge.

E4200 - low transfer rate

My laptop has internal wireless N and my transfer rate is 58 which I should get at least 300.
What's great about it: The guest connection
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There are a lot of factors that come into play with regards to your connection speed. A few things to keep in mind:
1) In order to get the best possible speed, your security mode needs to be either at WPA2-AES or disabled. I don't see this as your problem, otherwise your connection would be capped at 54Mbps and not reach the 58Mbps that you've mentioned.
2) Placement of the router. It matters a lot. The wireless signals typically travel better from higher to lower, and the router's signals get affected if the device is placed in a corner. This affects N routers more so than the older G routers because of the technology used in the newer devices.
3) Interference from other devices on the same frequency or from other wireless networks. This one is a fairly common one. Most wireless networks operate on the 2.4Ghz frequency, as do appliances like microwaves and cordless telephones and even Bluetooth devices. All these will end up causing interference to your network and affect speed and range. The simplest thing to do is change the channel on the router.
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Usb transfer rate decay drastically

hi to everybody,
i have a problem:
when i transfer to an usb, transfer rate decay drastically
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is normal ??? anybody have this issue ???

Much has been posted in many distros concerning the USB flash problem.
A tutorial regarding the design of Flash devices reveals the basic problem with Flash in general.
It is designed to perform in u know what..windows. The design sets up Flash in FAT32 and lo and behold it runs best in windows!
Trying to get the industry to design specially for Linux is like trying to get a donkey to move.
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Last edited by lilsirecho (2011-09-25 15:46:23)

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version 12.2
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All - Thanks to Kevin's post, I have stumbled onto something....what I don't exactly know.
In my testing, I was FTPing from my linux box on 3x to my server on 1x...transfer rate was ok, 19 seconds for 100 mb. With my windows box on 3x, I was mapping a drive and copy/paste from 1x to 3x. That was the difference.....but WHY? I need to resolve this piece of the puzzle since I need the ability naturally, to drag and drop between 3x and 1x.
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http://support.apple.com/kb/HT2518
and Welcome to Apple Discussions

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Hi,
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I'm having the same problem with very slow transfer and it's even more mystifying.
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Slow Wireless and Erratic Transfer Rate

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