(sorry for my poor english)
Hello everyone,a few months back i made a post about a PROBLEM i had with a wifi usb adapter,well i  bought a new adapter (pci this time) and for some time it worked just fine,but now its starting to do the same as the usb adapter,wich to my eye means the problem was not the adapter to begin with,thing is that sometimes it goes terribly slow,from downloading at almost 1mb\s to 50kb\s,i had a friend come to my place with his laptop and when he connects to the network it works perfect,i formated my hdd and installed a new os and it will still go slow whenever it wants to,i dont think my net is being stolen since i live "in the middle of freaking nowhere" and there is no one around to steal it,i dont know what to do anymore.
The "TP link wireless configuration utility" shows that i have around 30% signal strenght wich has always been more than enough,what i find strange is that the rate is always changing from 11mbps to 1mbps,shouldnt that be 54 mbps all the time?im kinda lost here.
Could this be a psu problem? the psu i have right now is a generic one and it has gave me problems in the past.
Maybe a problem with the hdd? both of my hdd´s are quite old and are starting to show the age.

here are some of my pc specs
SO:win 7 ultimate 64
pci wifi adapter:TP link TL-WN851ND
MOBO:asus p5kpl-am EPU
CPU:intel q6700
GPU:gtx 550 ti

i have the latest drivers for EVERYTHING installed.
and i dont know what else to say,thanks in advance.
Router specs?
DSL or cable?Wireless problem are seldom. if never, related to the hard drive. The drivers are loaded at BOOT time and remain in memory.

In some cases the motherboard itself generates interference to the wireless connection. Let's hope that is not your case. If so, you have to move the antenna away from the computer. And make sure all the shields are in place on your computer, including the I/O shield.

Your PSU haws to give +12 volts, +5 volts and + 3.3 volts to the motherboard. Plus another +12 on a separate connector.  I have never heard of a PCI witless failing because of a weak PSU. Now if the PSU was weak, you would think other things would fail also.

How far away is the wireless router?  Can you get it closer to the PC? at a distance of about 3 meters, or 10 feet, you should have a 100% signal and get a full 54 Mbps all the time. But with a 30% signal it can vary a lot.

Personally, I think a USB adapter on a short cable  is a better choice when you are having signal problems. Or else get an antenna on a cable so you can more it around for the best reception.

For more ideas and tips, do this:
find the search box on the upper right of this page.
Type in:
wireless troubles
And press enter. You will find at least a dozen old articles that may help.I cant tell you the router specs right now because the room with the router is in the second floor and i don't want to WAKE up anyone (its very late here)
I can tell you it is dsl.


As i said the router is in the second floor while my computer is in the first,around 8-10 meters away,i have an ovislink antenna (wich looks gorgeous) with 1.5 meters of very fat wire,the guy in the store told me that this is a very good antenna with one of the best wires,i have played positioning it around and its in the best spot i could find,i don't think the distance is a problem since it has always worked well with this setup getting 30% signal,then again i know little to nothing about wireless connections.
I'm borrowing a friends 700w psu just in case.
I just get this weird feeling that the problem lies in my pc not in the router,distance or signal.
while i was writing the first post my connection was slow,few minutes later its back at its normal speed,just to show how random this is.
I'm checking old posts,if i find something helpfull ill let you know
Don't think it's your PC.
Win7-64
WiFi adapter - 802.11n

Try changing your wireless channel.
http://www.microsoft.com/athome/setup/wirelesstips.aspx#fbid=eQtctflLKQDPlease shoe us the antenna you have. If you are below the router, the signal will be weak and unreliable because the antenna is in the wrong position. There is no reason to think the adapter is bad. The issue is environmental factors and antenna position and interference.

Cheap entry level wireless adapters can work as good as the fancy ones. The technical specs are nearly the same. You can pay for  features that do nothing  to improve  signal quality.

Conditions vary widely and can change without any obvious visible reason. The 802.11 devices use microwaves at very LOW power and are subject to interference. Line of sight is NOT the critical issue. Microwaves do indeed penetrate some materials very well.

The best low-cost solution is to drill a hole in a wall and drag a cable and use a direct connection.
FWIW my connection also jumps around between 1.0 Mbps & 54.0 Mbps, I've become convinced it has nothing to do with the internal reception between my wireless adapter & the router.

I think my router sets the speed depending on it's connection speed to the internet via my 3G modem.