Originally Posted by cadaveca
It's NOT that simple, phan.
At least, I do not beleive so.
It's not about one affecting another in the PC... It's much more complex and involved than that.
Otherwise, why does 120 FPS let ME play better, on a 60 Hz monitor?
I believe because the game responds to your commands at 120 FPS, because your hub is fast enough to process the I/O and turn it into a tangible command for the application/engine. Your rate of command never changes - 1000hz - but the rate of response to command processing is what dictates the entire system.
I agree with you that the system is complex - but because it is central, with a single output, and it becomes simple since the output is what matters (as you even say, on a 60FPS monitor, my hub output of 120 makes the game more responsive) - the monitor is being fed 120fps and your I/O is captured at 120 FPS, the display itself is not as relevant as the 120FPS hub output (but it would be better at 120hz).