Updated: 27th February 2016 - Should anyone have any suggestion I will be most pleased to update and improve the text. Just leave a reply to this post.
FSX is and will always be a 32 bits application. At the time of writing this post (september 2016) P3D (latest version 3.3) is also a 32 bits application.That means they can only handle 4 Gbytes of your installed RAM. No matter how much RAM you've got on your system. Even if you have 128 GB of RAM a 32 bit application such as FSX or P3D can only make use of up to 4 GB of RAM. Concorde-X is probably the most demanding plane on the