Since my new PC with an RTX3090 graphics card was straight out from the box, the framerate steadies around 30 under Ultra settings.  Even though I was a bit surprised by this low number, I didn’t pay much attention to it since everything seems to be working fine.

Until the last weekend I had some time seriously looking at the new system.  I found the framerate didn’t change much no matter what I did to the settings.  The framerate still sat around 30 somethings.

I started to wonder why since the framerate on my other computer with an i7 6850 CPU and 1080Ti graphics card gains a lot more than that under Ultra settings.

Excluding the CPU and the graphics card, the most suspicious cause of the low framerate seems to be from the monitors I found lastly.

My new PC is connecting with three 4K TVs (3840 x 2160) — 65-inch in the middle and two 49-inch on both sides.  And the other PC is connecting to two 27-inch monitors (2560 x 1440).

I tried disconnect the two smaller TVs from the new PC but the result was the same.

After some thoughts, I suddenly recalled a friend who suggested to cut the refresh rate of 4K monitors from 60Hz to 30Hz a few years ago because that cured the micro-stutter on his setup for P3D.  Although the tweak didn’t have any effect on my system but it did gain a little in framerate.  For such reason, I locked all my 4K TVs at 30Hz since then (see my Post 468).

Bingo, after I changed the refresh rate back to 60Hz, the framerate jumps double, and the screen rendering seems more solid, too.

Many 4K monitor users might not have the issue I had.   But just in case, the default 60Hz refresh rate is definitely more user-friendly to MSFS.