intel pro 3945 wireless SLOW d/l speeds

Recently put Vista on my dv8000t. When I download files now, I get about 20-30kps as opposed to the 200-400 I used to get with XP. Everything else is the same. Same router, same signal.

I have already tried turning off firewalls in Vista and on the router, I have no anti-virus software running at the moment, I have the brand new Intel driver for my wireless card, I have tried on several different access-points with same result. No one has been able to help me out with this and I've searched several forums and other resources online without finding a solution. Anyone have a clue?

No fun downloading at dialup speeds.

PS - With the newest Intel wireless driver, my file downloads often start at 400-500kps then rapidly drop until they are below 30kps again and stay there.

-Wintery

 

It may Window's TCP/IP settings i.e DefaultReceiveWindow, MTU, etc. I would recommend Cablenut, but I'm not sure if it works for Vista. Google for "tcp/ip settings tweak" or something. Sorry I couldn't be more helpful. I'm on the Intel 3945ABG adapter as well and my speeds are fine, but I'm on XP.

 

Have you tried Intel's new drivers (released 5/25)?

Also you might want to give TCP Optimizer a shot.

EDIT : You already tried the new drivers, my apologies.

 

Go through to the driver's advanced settings in the Device Manger to make sure transmit power is high and power saving is turned off. Also, go to Power Options in the control panel, click "Change plan settings" under the power plan you have selected. Then click "Change advanced power settings" and make sure that your wireless adapter is set to Maximum Performance while it's plugged in.

 

I picked up a new IBM ThinkPad T60P (Wide) running Vista Business, and I am experiencing the same problems with an extremely slow wireless connection. I get the same slow performance on the wireless network in my office as in my home.

The second I disable the wireless and plug in the cable directly to the router (ZyXeL) everything runs perfectly. I also tested connecting an Apple AirPort to the router (via cable) and connected directly to the AirPort as an access point instead of connecting to my normal wireless network, and then everything was working just fine for some reason (almost as fast as when I connect directly to the router via cable)!

The really weird thing is that I get really quick download rates on at least one website ( www.dailyrush.dk) where I can download files at 1.1 MB/s (I should have 15 mbit downstream). The web pages of that website still load pretty slow though when I'm browsing. Most other websites that I have tested load insanely slowly, both when I'm just browsing the pages and when I'm downloading files. For example a 1024 x 695 pixel JPG on Flickr.com might take several minutes to load, or simply time out. The Google front page sometimes takes 15 seconds to load.

I have my old laptop parked right besides the new one, both connected to the same router on wireless, and the old laptop (IBM ThinkPad T41 running XP) performs fine - downloading anywhere from 10 to 100 times faster!

It also takes forever to connect to VPN, perhaps 15 or 20 seconds on the Vista laptop and no more than 2 seconds on the XP machine.

When I ping www.google.com in a command prompt I get some packet loss (between 25 and 100 %) but reasonable ping times averaging about 45ms which is the same as on my old laptop.

I have tried pretty much everything:

* Disabling Windows Firewall
* Disabling TCP/IP v6 and those other entries in the wireless adapter configuration that are new in Vista
* Disabling security on the router entirely
* Changing security on the router to WPA and WPA2
* Changing the channel on the router (tried several available channels)
* Switching between 802.11 a/b/g modes on the router
* Booting up in safe mode (heard that worked for someone with a similar problem)
* Updating the wireless adapter driver to the newest version
* Installing all available updates from Windows Update
* Moving my laptop really close to the router (duh)
* Uninstalling MacAfee
* Uninstalling Bullguard
* Uninstalling a bunch of pre-installed IBM stuff

I have come across several threads online where people have had the exact same problem and solved it by uninstalling the pre-installed MacAfee software. My laptop came with MacAfee too but I uninstalled it right away and installed Bullguard instead. When I noticed the connection problems I uninstalled Bullguard too, but little did it help.

I really hope that someone can help me out here ... I'm kind of running out of ideas :-( Thanks in advance.

Cheers,

Stefan