It seems the fix i posted above only delayed the problem and after about 5 minutes my FPS kept dropping to between 10-20fps. I however did some additional research and found out its due to Logitech components (As Maxbunny stated previously). The link I found is listed below:
After applying the fix I am getting a constant 60fps (4K DSR) even after almost 2 hours of game play. Just thought I would post an update if anyone else wanted to replay this classic with modern hardware and experienced a similar problem.