Why can most computers run modern games really well but extremely stutter when emulating old games

Question

Why can most computers run games like RDR2, Cyberpunk, etc. Really fast but when emulating ps3/Xbox360 games it lags and can barely run it?

In: 690

Answer 1

Another thing that I haven’t seen mentioned is that many of those emulated games didn’t run especially well on the original hardware, either. In the PS3/Xbox 360 generation games running at a 720p resolution and capped at 30fps was the standard. If you can emulate one of those games at, say, 1440p and 60fps, then your PC is actually running the foreign instructions significantly better than the original hardware the games were built for. That’s basically pushing out 8 times as many pixels per second as the original hardware.