Different USB ports on PC giving different download speeds via USB Adapter.

As title states, fucking annoying, the USB ports at the back of my PC give me about 1/3 less download speed, and 2 less bars of internet strength connection, also I'm unable to watch 1080P streams etc with it plugged into the back without it reloading every 30 seconds for a second to buffer. Now the ones on the front of the case on my PC work perfectly, but every 30 minutes the internet dies until I pull out the USB adapter and put it back in, then it's fine with great strength and speed for another 30~ mins then it'll die, doesn't matter what I do, it will fail, I can leave the PC and if I come back it will be without internet, fucking frustrating.

Any idea why this is? USB 2.0 Ports also give much faster speed than USB 3, but all 4 ports on the front of my PC lose internet after 30 mins, none at the back do, but the speed is much slower, and I get rubberbanding(?) walking on the spot etc in games and constantly lag spikes if I use those ports.

Basically, why does it do this, and how can I get the ports at the front to stop dropping, every 30~ mins?

Any help much appreciated.