Good morning Stephane...
Here is what information I thought you might need.
Now All my Sliders in the FSX Game are moved one (1) spot to the Left of Maximum Setting.
In the FSX Game itself there are two choices for the High Definition Display Adapter.
Intel(R) HD Graphics 4600
Intel(R) HD Graphics 4600-1
I take it the 4600-1 refers to my main monitor But I find the 4600 works better.
The NVIDIA GeForce GTX 580 does not show as a Choice in FSX
I plugged everything into the Intel(R) HD Graphics Display Adapter because it is the newest and when I plugged my monitors into it I eliminated two Pin Adapters I was using for the NVIDIA Adapter.
Now another question is does it matter what Search Engine I use
I ask that because the Flight Plans would not Print when in the FSX Game, I was using the recommended Internet Explorer.
Now Windows 10 I believe uses Edge.
I am now using Google again and the Flight Plans Print OK. So Google is my Default Browser.
Tried all the Filtering Settings in the FSX Settings and see little difference. I have FSX set to Bi-linear.
Intel(R) HD Graphics 4600 [Display Adapter]
NVIDIA GeForce GTX 580 [Display Adapter]
Acer AL1916W [Monitor] mostly used for GPS & Autopilot...Display
Samsung SMB2330H [Monitor] used for simulated flight
Windows 10 Professional (64)
Boot Mode: UEFI with Secure Boot disabled
4.00 gigahertz Intel Core i7-4790K
256 kilobyte primary memory cache
1024 kilobyte secondary memory cache
8192 kilobyte tertiary memory cache
Multi-core (4 total)
Hyper-threaded (8 total)
3570.09 Gigabytes Usable Hard Drive Capacity
3129.05 Gigabytes Hard Drive Free Space
8054 Megabytes Usable Installed Memory
This machine has no other games on it and it's primary use is for the Flight Simulator Game.
Stephane...do you think I should update my Processor