I am using a Belkin F5D7632-4 wireless router which I connect to my main PC via ethernet cable and get good speeds 6000kbps+. I also have a second PC downstairs which I connect to the router via a Belkin F5D7050 however, despite the signal strength being excellent, it refuses to go above 4000kbps in speed. It also seems to frequently pause throughput for a second then resume which you can see when you do a speedtest. I previously used the USB wireless adapter on a different computer (in the same place in my house) and had no problems, the wireless speed always matched the wired speed of my connection.

I have two belkin USB adapters, a v4000 and a v3000 but they both do the same thing, refuse to allow downstream speed of more than 4000kbps and the throughput is stop start stop start.

I am wondering if it is a problem with the USB ports of this computer because, like I say, I previously used the adapter on a different computer with no such issues. They are USB 1.1 ports but that was the same with the other computer I used which worked fine. The motherboard I am using now is an ECS K7S5A. I have also tried changing the wireless settings on the router (channel, wireless mode etc.) but that hasn't helped and, as I say, the signal strength is reported as excellent on the computer where the adapter is used.

Any suggestions as to what the problem could be and possible solutions?

Thanks.