FPS limitation even with some high-end PC

"In other words, we're waiting for our hardware to catch up with our software."

 

Really?

Yes, really.

Harping on about 32-bit and 64-bit exposes your ignorance, because that simply addresses how big of a memory chunk can be accessed by the software. It doesn't do anything to address the limitation of getting data from one part of the system (for instance, system RAM) to another part (for instance, GPU RAM). Adding an extra cylinder to an engine won't increase the horsepower if it's limited by a narrow fuel line.