Lag across all UE4 games

I currently own 3 games running on the UE4 platform, those games being Fractured Space, Unreal Tournament, and Paragon. I don’t know where else to post this question, since this applies to all games running UE4 on my machine.

The biggest problem i’m facing right now is a lag issue. The game stutters in 0.5-1 second intervals and lags for about 2-5 seconds, it starts off bad and progressively get’s somewhat better, but only by a few seconds. Any framerates between the stuttering intervals are somewhere between 50-60 fps on medium-high settings. This makes any game running UE4 completely unplayable for me, since the lag is occupying most of the time spent playing.

Specs:
CPU:

AMD FX-8320

GPU: R9 270 2GB GDDR5

16GB DDR3 (1600MHz) Kingston HyperX

Windows 7 Home Premium

(All drivers updated)

Looking for a solution or even a hint to the problem yielded no results, and has been extremely frustrating. Any help would be greatly appreciated.

Do you have a usb modem? cos that’s what causes it for me