Should this PC setup be sufficient to get 30 FPS all sliders max ???

Intell i7-870 Oc @ 4Ghz, Mugen3 cpu cooler, 8 ram kingston memory, 2 samsung SSD 250gb hard disks, msi P55-GD65 mobo, msi gtx760 twinfrozr gaming oc versie 4GB (outside view), sapphire 5700 (captain display), 1gb, cooler master 800w power supply, 2x 24" flatscreens, 1, 17" flatscreen, PC score : 7.5

Software : Prepar3d, Rex 4 Textures, Megascenery Belgium, Aerosoft Brussels X, Prosim, Active sky Next.

I only get 12 FPS when getting cloudy or bad weather ....