I have a GREAT monitor and a GREAT video card but I was not getting the performance or the details I thought I should so I did some checking and found that I was using the HDMI output on the video card instead of the DisplayPort on both the monitor and the video card. I changed it yesterday and WOW!!! what a difference.
My monitor is a Samsung SD850 32" WQHD (2560x1440) 16:9 Aspect Ratio LED-Lit Monitor and my video card is a Nvidia RTX3060.
It also could be something else.
With some Samsung monitors, they are limited if you’re using HDMI 1 port.
And all is Ok when using the HDMI 2 port.
It typically has to do with the refresh rate.
Monitors (for the most part) can handle a higher refresh rate over DisplayPort.
In general you want at least HDMI 2.0-capable ports and cables to use HDMI with higher resolutions and refresh rates. The older HDMI 1.4 standard is more limited in total bandwidth, and might thus be limited (such as one 4K monitor I have that can only do 30 fps at full resolution on HDMI, but works at 60 on DisplayPort)
DisplayPort’s earlier versions have a higher baseline level of bandwidth and resolution support, which is nice as they’re thus slightly more reliable if you don’t know what version they are. 
Display Port also helped me also.
My Rig
Processor Intel(R) Core™ i7-9700K CPU @ 3.60GHz 3.60 GHz
Installed RAM 32.0 GB
System type 64-bit operating system, x64-based processor
SanDisk SSD G5
Edition Windows 11 Pro
Version 22H2
Installed on 10/28/2022
OS build 22623.875
Experience Windows Feature Experience Pack 1000.22634.1000.0
NVIDIA GeForce RTX 2060 Super with 8g memory
Driver 516.59
DisplayPort
G Sync Monitor: Dell 27 Gaming Monitor - S2721DGF
HP Reverb G2
Internet Speed
230.9 Mbps download
32.5 Mbps upload
May I ask if there is any benefit in getting a high refresh rate monitor such as 144hz for my modest RTX2070 setup which is only capable of running at under 60fps in most situations? And if i were to upgrade to a better GPU, would there still be any advantage if i keep my fps locked at 60hz. Only talking in the context of MSFS. Thanks
No, no benefit.
No, no benefit
Ok great, thanks MSFSRonS. I was thinking this would be the case. Dont think MSFS needs to be run at very high refresh rates like competitive/shooter style games. I dont notice a thing between 30fps and 60fps myself as long as the rates are stable.
My general recommendation is use display port for computer monitors unless the monitor doesn’t have one or you’ve run out of ports, and only use HDMI to connect to a TV.
Many high refresh rate monitors are only capable of running at their max refresh rate over display port.
Also Nvidia defaults to limited RGB output (16-235) over HDMI instead of full (0-255) I think AMD also does this in some cases as well.
They do this because this is correct for most TV’s but not for most computer monitors.
You can always change that setting in the video card control panel but a lot of people don’t know that.
I could not get into my bios do to less than spec HDMI cables, apparently 1.0 is not new
HDMI
-------------
Transmission Bandwidth Resolution HDR Support HDCP Support
HDMI 2.1 48G 8K @ 120Hz YES 2.2
HDMI 2.0b 18.0 Gbps 4K @ 60Hz 4:4:4 Yes 2.2
HDMI 1.4 10.2Gbps 4K @ 30 Hz NO 1.4
4K @ 60Hz 4:2:0 No 1.4
HDMI 1.3 10.2Gbps 1080p @ 60Hz No 1.2
--- Premium HDMI Cable - 18Gbps - 4K 60Hz - HDMI 2.0b
--- Ultra High Speed Cable - 48Gbps - 8k 60hz & 4k 120Hz
HDR, VRR, eARC, and all other HDMI 2.1
Display Port
------------
1 display 16K (15360 × 8640) @ 60 Hz
2 displays 8K (7680 × 4320) @ 120 Hz
2 displays 4K (3840 × 2160) @ 144 Hz
3 displays
Common Display Resolutions
--------------------------
UHD 8K 7680 × 4320
UHD 5K 5120 x 2880
UHD 4K 3840 x 2160 (monitor) - 4096 x 2160 (cinema)
UHD 2160p 3840 x 2160
QHD 2K 2560 x 1440 (monitor) - 2048 x 1080 (cinema)
QHD 1440p 2560 x 1440
FHD 1K 1080p 1920 x 1080
(Full HD, Quad HD, Ultra HD)
I don’t notice any difference, on any resolution or refresh rate, between HDMI 2.1 and DisplayPort 1.4.
What monitor do you have??? That could make a very BIG difference.
As long as everything in the chain supports the necessary version, there is no difference. If any component (GPU, cable, or monitor) doesn’t meet requirements, there is a difference. 
I think HDMI v2.1 finally caught up with Display Port v1.4 so when working with devices and video cards which meet these standards as @Vibstronium said: