Possible Faulty GTX 660 Issue

Hello all.

Two years ago I bought this alienware X-51, specs are:

Intel(R) Core(TM) i5-3450 @ 3.10 GHz
8GB RAM
64 Bit
Model: Andromeda-R5
Nvidia GTX 660

My first two months were going smoothly, it ran fast with no issues, warm up times after boots were somewhat slow but I could handle it.
2 months later, an issue with my sound had appeared out of nowhere, whenever I play modern games they seem to make a "crackling/popping" noise through my TV. I got technical help and I switched to Realtek instead of Nvidia  drivers. and it fixed my problem. While trying to fix this problem I decided to update my card to the latest drivers. Soon after, another problem came in. This issue was much worse, on every game/program including Internet Explorer the computer would freeze and, to make it worse, a loud buzzing noise would appear which adjusted itself to the Pitch to whatever program was making a sound. I have tried the following...

Reinstalled Drivers
Rolling back to older drivers
Reducing Clock speeds
Cleaning out C: drive
Cleaning my PC of dust (Which worked for about 1 month and two weeks)
Changing USB ports
Changing HDMI slots
Many more which I cannot even remember


I am left with two options:

1) Try removing Nvidia 3D Viewing Driver and HD Audio Driver.
2) Swapping out my GTX 660 For a GTX 960

The Problem is that I don't want to risk £150 for a possible solution that might not work.

So my main question is. Will replacing my card for a better one work?

Any help would be appreciated

Many Thanks,
Jason

(BTW, my card ran out of warranty)