After many months I have finally found the solution to the audio and screen drop out issue with my Reverb G2, I am talking about the constant volume icon popping up with a freeze of the sim which occurs in all games.
The problem is that the motherboard RealTek HD Audio device is competing with the Reverb G2, so it starts switching between the two. Go to your BIOS and disable the onboard audio device (typically called HD audio device or similar in Integrated Peripherals on an AMD motherboard. You only need this if you are using the 3.5mm jack ports on the back of the motherboard, otherwise disable it. If you are using the 3.5mm connections then you will need to use your audio 3.5mm out on your monitor instead which gets its source from DP/HDMI. Any USB headphones will be fine as they have their own device drivers separate to the motherboard one.
The issues came back! The real solution was to get the new cable from HP.