I long ago lost that monitor and related hardware over the sands of time, moving one place to another multiple times.

The benefit though was that I effectively quadrupled the number of pixels on screen from the common 1024x768 resolution of the time.

1024x2=2048, 768x2=1536

I was basically pioneering early extra high definition video output before it was even a thing.

The images themselves wouldn't look any different, except smaller as each pixel was only 1/4 of original size, giving me a much larger visible pixel area for image editing.

It wouldn't have helped gameplay much though, as I had to sacrifice framerate to accomplish that.

Edit: You definitely can't do shit like that on modern LCDs, that category of overclocking is exclusive to old CRTs.