So I have a simulator setup with four monitors running at 1920*1080, 60HZ. I noticed that with three monitors and everything running at max settings except anti-aliasing at 4x SSAA, I get around 40 fps and about 92% of GPU load, which is decent. However, as soon as I configure the fourth monitor, the fps drops to 10 and surprisingly, the GPU load is only 20%. I have a GTX 1080 and i7 4790k with 32g of memory, which I think is a decent setup.
Any clue on why this is happening? And though I know that x plane 11 does not support SLI in general, will SLI solve this particular problem? Thank you very much.