That's certainly a very fast system. Do you have two disks at 1 TB to build a raid volume? Fast Hard disk access is essential if you have lots of scenery and aircraft. Good cooking for cpu and a motherboard which allows to overclock a bit. I have a  i7 3770K 3.5GHz, 16 GB, DDR3-1600, Asus Sabertooth Z77, LGA1155, PCI-E 3.0, SATA III 2x1TB Western Digital Caviar Black, 7200rpm, 64MB RAID, 2x80GB Intel SSD RAID, Gainward GTX-570 Phantom 1.28GB, Win7/64 SP1. After optimizing FSX with ultimate defrag I can fly almost stutter free, but the disks could be faster still. The Nvidia card is a dissappointment. It's not better than my earlier Radeon, but sometimes I get black squares instead of textures. Maybe too little memory, I don't know. Never had this with Radeon graphics.