Is the cable plugged into the graphics card yes?
Can you try it on another monitor (Do you have a spare one you can try)
You could also try using a different type of cable
Recently I purchased a corsair 1500 v2 headset (Wired). The drivers and software all installed correctly but when I went on to a teamspeak server my friends pointed out that a buzzing was coming from my microphone (They could still hear me) . I checked it using audacity and by using other...