So, I'm following the refresh rate conversation with much interest.
The AC supply here in South Africa is 220v @ 50Hz
My laptop's screen resolution is 1920x1080 @ 144Hz that's where my sim runs
My LG second monitor is 1366x768 @ 60Hz that's where my FSNav map sits. - that's the max resolution.
I stand corrected, but I really think that fps has nothing to do with either the ac supply frequency, nor the refresh rate of the monitors.
The fps rate is subject to memory, not forgetting that FS2004 is a 16bit program running in Windows 11 (in my case) that will only address 4GB of RAM, & GPU memory, irrespective of how much RAM your PC has. I've patched my FS2004 with that 4GB patch, and things run very smoothly.
I've locked my frame rate at 30fps, as the more frames you have, the more resources are being used, and I have not noticed any smoothness improvement when running more than 30fps.
I'm going for perceived smoothness as opposed to chasing a higher fps setting.
My laptop has AMD Radeon Graphics, as well as a Nvidia GeForce RTX3050 laptop GPU, with 4GB RAM, and I've set my FS2004 to use that.