I am running X-Plane 11.35 on a new computer described by the vendor as "ultra fast". The frame rate is generally less than 15 per second. Settings are visual effects medium, texture quality medium, antialiasing off, number of world objects low, reflection detail minimal. My set up is AMD Richland dual core processor 4.1Ghz, ATI Radeon HD R5 graphics, 16GB 2400Mhz RAM DDR4, 1TB hard drive Windows 10 64-bit. These are all equal to or greater than recommended, except that the graphics card is not on the list of those supported. Is that the problem? Do I need to replace the graphics card in order for X-Plane to run properly?